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UGREEN NASync vs UniFi UNAS – Which Should You Buy?

Par : Rob Andrews
29 octobre 2025 à 18:00

UGREEN NASync vs UniFi UNAS – Which Should You Buy?

In the evolving landscape of network-attached storage, the arrival of UGREEN and UniFi (Ubiquiti) marks one of the more interesting shifts in consumer and prosumer data management over the last two years. Both brands, previously recognised for their strength in peripheral hardware and networking respectively, officially entered the NAS sector around late 2023 to early 2024, each taking distinct approaches to design, functionality, and ecosystem integration. UGREEN, following a successful crowdfunding launch in early 2024, built its NASync series around desktop and SSD-based solutions for home, creative, and prosumer users seeking all-in-one local storage, virtualization, and multimedia platforms. Its portfolio now includes systems ranging from the ARM-based DXP2800 to the Intel-powered DXP8800 Plus, offering performance tiers from modest home use to compact workstation-class environments.

Meanwhile, UniFi, a brand with a long history in professional networking and surveillance infrastructure, released its UNAS family within the same timeframe, targeting users already invested in its ecosystem of routers, cameras, and switches. The UNAS lineup now spans from the compact UNAS 2 and UNAS 4 desktop units to the rackmount UNAS Pro 4 and Pro 8 systems, with each designed for straightforward deployment and remote integration within the UniFi Network and Protect platforms. Despite arriving from very different sectors, both companies have effectively lowered the cost of entry to reliable NAS storage while redefining how integrated ecosystems can extend storage functionality. This comparison explores their respective design choices, hardware capabilities, software environments, and operational scope to assess which platform is best suited to different user scenarios in 2025 and 2026.

UniFi vs UGREEN NAS – The TL;DR

In comparing the UniFi and UGREEN NAS platforms, it becomes clear that each brand represents a different vision of what modern network storage should be. UniFi’s UNAS series builds on the company’s heritage in networking and surveillance, delivering a range of efficient, ARM-powered NAS systems that integrate tightly within the UniFi ecosystem. Models such as the UNAS 2, UNAS 4, UNAS Pro 4, and UNAS Pro 8 prioritize reliability, centralized management, and long-term stability rather than raw compute power or expandability. Their hardware is deliberately fixed—non-upgradable memory, ARM Cortex-A55 or A57 CPUs, and limited caching support for NVMe drives—but balanced by advanced network connectivity, including dual 10G SFP+ ports, PoE+++ power options, and redundant power supplies. UniFi’s storage OS focuses on core NAS fundamentals: multiple RAID levels, snapshots, encryption, and secure remote access via the UniFi controller. It is intentionally simple, relying on integration with other UniFi products for extended functionality such as surveillance and automation. In contrast, UGREEN’s NASync line follows an open, performance-driven approach designed for flexibility and standalone capability.

Ranging from the DXP2800 with its 8-core ARM processor to the flagship DXP8800 Plus powered by Intel’s i5-1240P, these systems cover every segment from entry-level home use to prosumer and light enterprise workloads. UGREEN’s hardware offers user-upgradable DDR4/DDR5 memory, PCIe expansion, NVMe storage pooling, and multi-gig connectivity, with higher-end models adding dual 10GbE, Thunderbolt 4, and even GPU compatibility. Its UGOS Pro operating system transforms the NAS into a hybrid server capable of running Docker containers, virtual machines, and AI-based indexing, alongside comprehensive backup and synchronization tools across cloud and local environments. While UniFi emphasizes simplicity, low maintenance, and enterprise-grade network reliability, UGREEN delivers a richer feature set and greater hardware freedom at the expense of long-term enterprise validation. In essence, UniFi NAS suits users already invested in UniFi’s ecosystem who value cohesion, predictable performance, and integrated security, whereas UGREEN NAS appeals to those seeking raw performance, versatility, and independent control without ecosystem constraints.

Why Buy UniFi NAS?

Why Buy UGREEN NAS?

Want to support us NASCompares? Use the links/buttons below, and anything you purchase results in a small commission coming to me and Eddie @NASCompares. It really is just the two of us doing everything, and purchasing things via these links will allow you to passively support creators like us (as well as allow us to keep making videos, providing support, running the forum, making tutorials and more) at no extra cost to yourself!
  • Ecosystem Integration: Seamlessly integrates with UniFi Network, Protect, and Access systems, allowing unified management through a single controller interface.

  • Centralized Management: Designed for administrators managing multiple UniFi sites or devices, providing consistent firmware, remote access, and monitoring from one dashboard.

  • Reliable, Efficient Design: ARM-based architecture ensures low power draw, cool operation, and stable long-term performance with minimal maintenance.

  • Enterprise-Grade Networking: Equipped with up to dual 10G SFP+ and 10GBase-T ports, plus USP-RPS redundancy for professional deployments.

  • Proven Security Framework: Benefits from Ubiquiti’s mature network security infrastructure, signed firmware updates, and NDAA-compliant hardware.

  • Superior Hardware Performance: Offers a full range from ARM to Intel Core i5 CPUs, with upgradable RAM, NVMe storage pools, and optional PCIe expansion.

  • Versatile Software (UGOS Pro): Supports Docker, virtual machines, AI photo indexing, and multi-platform backups out of the box.

  • All-in-One Standalone System: Functions independently without relying on an external ecosystem, ideal for users wanting a complete server in one unit.

  • Advanced Connectivity: Includes 2.5 GbE and 10 GbE networking, USB 4/Thunderbolt 4, and support for direct-attached workflows like video editing or large-file transfer.

  • Rapid Development and Updates: Frequent firmware releases continually add new features, broader hardware support, and improved backup and security options.

 

UniFi vs UGREEN NAS – Design, Storage and Range

When comparing UGREEN and UniFi’s NAS portfolios, the first and most visible difference lies in how each brand approaches system design and deployment environment. UGREEN’s NASync series is focused entirely on desktop enclosures, reflecting the brand’s consumer electronics background and intent to cater primarily to home users, prosumers, and creative professionals. Each model, such as the DXP2800, DXP4800 Plus, and DXP8800 Plus, follows a compact, upright chassis layout with attention to quiet cooling and minimal footprint. The aesthetic is consistent across the range—metallic finishes, clear drive bay accessibility, and understated branding—intended to fit easily on a desk or in a studio environment. By contrast, UniFi’s UNAS range adopts both desktop and rackmount designs, depending on model class. The UNAS 2 and UNAS 4 are designed for smaller workspaces and integrate PoE+++ power options to simplify installation, while the UNAS Pro 4 (1U) and UNAS Pro 8 (2U) are full rackmount systems made from SGCC steel, reflecting their professional and data-center-friendly construction standards.

UGREEN’s systems emphasize flexibility and user-level expandability within their desktop footprint. Most models in the NASync line support 2.5-inch or 3.5-inch SATA drives, dual NVMe SSD slots, and optional PCIe or Thunderbolt expansion, allowing them to function as both storage servers and active editing platforms. The DXP480T Plus, for example, is an all-SSD NAS with four M.2 NVMe bays that appeals to users seeking maximum I/O performance for tasks such as 4K video editing or database caching. The DXP8800 Plus, the flagship, extends this design language with eight SATA bays, dual Gen 4 M.2 SSD slots, dual 10 GbE networking, and Thunderbolt 4 connectivity, making it one of the most powerful turnkey NAS options in the consumer space. In comparison, UniFi’s UNAS systems prioritize structural consistency and network integration over expandability. Even though all models provide dual or single NVMe slots, these are limited to caching duties. Drive capacity across the lineup scales more linearly, from two to eight 3.5-inch bays, maintaining a clear size-to-performance progression while focusing on rack density and cooling efficiency.

From a usability perspective, UGREEN’s design philosophy focuses on standalone versatility. Each NASync model is built to function independently as a complete storage and application host, with optional integration through standard network protocols. Physical accessibility is a clear design consideration, with quick-release trays, front USB ports, and in some models, SD card readers for direct media offload. The visual and acoustic design is optimized for open environments, with whisper-quiet fan systems and smart temperature management, making them suitable for use beside workstations or in living spaces. UniFi’s design philosophy, however, centers on infrastructure harmony rather than isolation. The rackmount models are designed to slide directly into existing UniFi network installations, using standard 1U or 2U spacing and consistent power integration with UniFi’s USP-RPS redundant supply network. Even the desktop UNAS 4 maintains visual continuity with UniFi routers and switches, using similar matte finishes, front-facing status LEDs, and clean ventilation lines.

In terms of product range, UGREEN currently offers at least seven NASync models, each targeting a specific performance segment. These include the DXP2800 (2-bay ARM), DXP4800 (4-bay N100), DXP4800 Plus (4-bay N305), DXP6800 Pro (6-bay N305), DXP480T Plus (SSD-only, N305), DH4300 Plus (4-bay ARM), and DXP8800 Plus (8-bay i5-1240P). Each generation introduces more advanced CPUs, faster interfaces, and expanded media capabilities. UniFi’s current UNAS range, while smaller, has diversified rapidly since its launch. The confirmed models include the UNAS 2, UNAS 4, UNAS Pro 4, UNAS Pro 8, and the earlier UNAS Pro 7-Bay, all of which use ARM-based processors and fixed memory configurations. A larger ENAS 16-Bay ZFS system is already in development, targeting enterprise and datacenter deployments in 2026. Compared with UGREEN’s more gradual tiered approach, UniFi’s product scaling is defined by form factor and network bandwidth rather than by CPU class or user workload.

Price segmentation further highlights their opposing strategies. UniFi’s UNAS line is priced aggressively to attract users into its broader ecosystem, starting at $199 for the UNAS 2, rising to $799 for the Pro 8, and including mid-tier models like the UNAS 4 ($379) and Pro 4 ($499). The pricing aligns with UniFi’s established model of offering capable hardware at low margins to encourage ecosystem investment across switches, cameras, and controllers. UGREEN, by contrast, positions its NASync devices as feature-rich all-rounders, with prices reflecting performance class: from $279 for the DXP2800 to around $1,299 for the DXP8800 Plus. The difference in pricing structure is significant but reflects how each company defines value—UniFi through integrated ecosystem scaling, and UGREEN through standalone hardware strength and included functionality.

Brand Model Range Form Factor Drive Bays NVMe Slots Networking Power Design Typical Price Range
UniFi (Ubiquiti) UNAS 2, UNAS 4, UNAS Pro 4, UNAS Pro 8, UNAS Pro 7-Bay Desktop / Rackmount (1U–2U) 2 – 8 × 3.5″/2.5″ 2 × M.2 (cache only) Up to 3 × 10 GbE (SFP+ + RJ45) Internal + RPS / Dual hot-swap PSU $199 – $799
UGREEN NASync DXP2800, DXP4800(+), DXP6800 Pro, DXP480T Plus, DH4300 Plus, DXP8800 Plus Desktop only 2 – 8 × 3.5″/2.5″ + SSD variants 2 × M.2 (cache + storage) 2.5 GbE / 10 GbE / TB4 / USB 4 External or internal PSU

 

UniFi vs UGREEN NAS – Hardware Range

The internal hardware philosophy of UniFi and UGREEN reflects two distinct interpretations of what a modern NAS should prioritize: efficiency and integration versus performance and versatility. UniFi’s UNAS series relies entirely on ARM-based architecture, a deliberate decision aligned with the company’s emphasis on low power consumption, predictable thermal characteristics, and embedded system reliability. Every model in the current UNAS lineup, including the UNAS 2, UNAS 4, UNAS Pro 4, and UNAS Pro 8, is built around a quad-core ARM processor—the A55 at 1.7 GHz for the smaller systems and the A57 at 2.0 GHz for the rackmount models. These CPUs deliver modest compute performance but strong stability and power efficiency, allowing for sustained 24/7 operation without requiring active thermal management beyond standard fan arrays. This design philosophy mirrors UniFi’s broader network device ecosystem, where embedded ARM SoCs dominate routers, gateways, and cameras, ensuring unified firmware management and hardware compatibility across all product categories.

UGREEN’s NASync architecture takes the opposite route, aiming to deliver workstation-grade power in compact form factors. The entry-level DXP2800 features an octa-core ARM CPU, already outpacing UniFi’s top models in raw processing capability, while the remainder of the series transitions to x86 platforms from Intel’s latest low-power and mid-tier lines. The DXP4800 uses Intel’s N100 processor, the DXP4800 Plus and DXP6800 Pro adopt the more capable N305 with improved iGPU performance, and the flagship DXP8800 Plus integrates the 12th Gen Intel Core i5-1240P, offering hybrid performance and support for hardware transcoding, virtualization, and PCIe Gen 4 NVMe. This variation in processor choice underlines UGREEN’s strategy of providing scalable compute resources for different workloads, from basic backup operations to multi-user virtualization and AI-assisted indexing. Unlike UniFi, UGREEN’s systems can operate as full Linux servers, running multiple containers or virtual machines without external dependencies.

Memory and expansion options further highlight the divergence in hardware scope. UniFi’s systems employ fixed memory configurations—ranging from 4 GB on the UNAS 2 and 4 to 16 GB on the Pro 8—with no user-accessible upgrade paths. This aligns with their embedded design approach, where firmware optimization and unified memory management are prioritized over modularity. In contrast, UGREEN’s NASync devices all support user-upgradable SO-DIMM DDR4 or DDR5 modules, typically allowing capacities between 8 GB and 64 GB, depending on the model. This flexibility benefits users running memory-intensive services such as Docker containers, Plex transcoding, or AI indexing. Moreover, many of UGREEN’s x86 systems support PCIe expansion cards, offering pathways to add 10 GbE NICs, NVMe storage adapters, or GPU accelerators, while UniFi’s systems are intentionally non-upgradable to maintain uniform hardware control and firmware consistency across the UNAS ecosystem.

Networking and connectivity options serve as another key point of differentiation. UniFi has leaned on its networking pedigree, offering up to three 10 GbE connections (two SFP+ and one RJ45) on the UNAS Pro 8, with lower-tier models still providing 2.5 GbE or Gigabit connectivity. Power integration is also a hallmark of their design. The UNAS 2 and UNAS 4 use PoE+++, allowing single-cable deployment through UniFi switches, while the Pro series employs redundant power via USP-RPS or hot-swappable PSUs, reducing downtime in managed networks. UGREEN, on the other hand, focuses on local performance flexibility, providing multi-interface options like 10 GbE, 2.5 GbE, USB 4, and Thunderbolt 4, depending on model class. This allows their systems to double as direct-attached storage (DAS) for editors or content creators, particularly when used via Thunderbolt, an option not present in any UniFi NAS. Power designs in UGREEN systems are conventional but efficient, ranging from compact external adapters on smaller models to integrated supplies on higher-end devices.

The overall hardware comparison reveals two clear user archetypes. UniFi’s hardware suits IT administrators and network professionals seeking dependable, uniform, low-maintenance appliances that integrate natively with UniFi controllers and services. UGREEN’s NASync hardware, meanwhile, targets prosumers, creative professionals, and small business users requiring computational headroom and direct system control. Where UniFi builds closed but predictable infrastructure devices, UGREEN delivers open and adaptable machines capable of serving as both NAS and lightweight servers. The contrast is not one of quality but of philosophy—UniFi favoring consistency and system management efficiency, UGREEN focusing on flexibility and computational breadth.

Brand Model CPU Architecture Memory Upgrade Options Networking Expansion Power Design
UniFi (Ubiquiti) UNAS 2 / UNAS 4 ARM Cortex-A55, 1.7 GHz (Quad-Core) 4 GB Non-upgradable 1 × 2.5 GbE, PoE+++ USB-C (5 Gbps) PoE+++ or external PSU
UNAS Pro 4 ARM Cortex-A57, 2.0 GHz (Quad-Core) 8 GB Non-upgradable 2 × 10G SFP+, 1 × 1G RJ45 None Internal PSU + RPS support
UNAS Pro 8 ARM Cortex-A57, 2.0 GHz (Quad-Core) 16 GB Non-upgradable 2 × 10G SFP+, 1 × 10G RJ45 None Dual hot-swap 550 W PSU
UGREEN NASync DXP2800 ARM Octa-Core 8 GB Limited 2.5 GbE USB 3.2 External PSU
DXP4800 / 4800 Plus Intel N100 / N305 8–16 GB (up to 64 GB) Yes 2.5 GbE / 10 GbE PCIe Gen 3 Internal PSU
DXP6800 Pro Intel N305 16 GB (expandable) Yes Dual 10 GbE PCIe Gen 3 Internal PSU
DXP8800 Plus Intel Core i5-1240P 16–64 GB Yes Dual 10 GbE + Thunderbolt 4 PCIe Gen 4 Internal PSU

UniFi vs UGREEN NAS – Software, Services and Apps

The most significant distinction between UGREEN and UniFi’s NAS platforms lies in their software ecosystems and the broader intent behind their development. UniFi’s UNAS software mirrors the brand’s overarching approach to product design: lightweight, efficient, and designed to integrate seamlessly into the UniFi Network and Protect ecosystems. The UNAS interface focuses almost exclusively on storage management and file security. It provides the fundamental NAS feature set, including multiple RAID configurations, volume encryption, snapshot management, and user-based permission control. Files can be accessed through SMB, NFS, with remote management possible via the UniFi portal or mobile app. However, beyond core storage functionality, UniFi’s NAS software remains deliberately minimal. It lacks support for virtual machines, Docker containers, or app installation frameworks, relying instead on integration with other UniFi devices for broader capabilities such as video surveillance, network management, or cloud relay services.

UGREEN’s UGOS Pro platform adopts a far more expansive, multifunctional design. The software is built on a modern Linux kernel and supports both ARM and x86 architectures, allowing for a full-featured environment with native support for containers, virtual machines, and AI-enhanced media indexing. Out of the box, users can deploy Docker, Portainer, Kubernetes-compatible containers, and KVM-based virtual machines, enabling workloads that go far beyond traditional NAS operations. Backup and synchronization options are also more diverse, with support for rsync, S3, WebDAV, iSCSI, OneDrive, Google Drive, Dropbox, and two-way synchronization across multiple NAS units. The interface emphasizes transparency and customization, giving users direct access to system-level configuration that UniFi’s more streamlined interface omits. Features such as storage tiering (using both HDD and NVMe), application sandboxing, and external GPU detection on select models position UGREEN’s UGOS Pro as one of the most open and flexible NAS operating systems currently available outside of enterprise-class environments.

In client and access support, the contrast continues. UniFi’s ecosystem is designed for centralized control and consistent performance across its product range. The UNAS systems can be monitored via the same UniFi Controller interface used for switches, gateways, and access points, creating a single-pane-of-glass environment that appeals to IT administrators managing multiple UniFi sites. Remote access and firmware updates are handled automatically through UniFi Cloud, and security is strengthened by integration with two-factor authentication, device certificates, and network isolation policies inherited from the company’s professional networking hardware. UGREEN, conversely, provides a more conventional NAS interface that supports multiple access clients and cross-platform tools. In addition to browser access and mobile apps for Android and iOS, users can mount shared drives directly within macOS, Windows, and Linux, while also leveraging a dedicated UGREEN Drive application for photo management and AI-based face/object recognition. Where UniFi’s UNAS feels like an extension of a larger network ecosystem, UGREEN’s software operates as a complete standalone server environment.

Security and maintenance are handled very differently between the two brands. UniFi benefits from a mature background in network device hardening, employing signed firmware, rolling updates, and extensive beta testing through its large enterprise user base. Features such as encrypted storage volumes, HTTPS enforcement, and VLAN isolation come preconfigured with minimal user intervention. However, the trade-off for this controlled environment is reduced user autonomy, as firmware customization and software-side experimentation are discouraged. UGREEN, while newer to the enterprise security space, implements encryption standards such as AES-256, offers built-in 2FA, and continues to expand its ransomware prevention and snapshot recovery tools. Updates arrive frequently and often include feature additions alongside security patches, though the brand still lacks a formal bug bounty or transparency reporting system comparable to UniFi’s. Overall, UGREEN’s software offers greater flexibility and control, while UniFi’s remains more mature and hardened within its controlled network framework.

Brand OS Name Core Focus App/Container Support Virtualization Backup & Sync Remote Access Security & Maintenance
UniFi (Ubiquiti) UniFi OS (Storage Module) File storage, snapshots, ecosystem integration No app store or containers None Local, NFS, SMB, UniFi Cloud Via UniFi Network / Protect Encrypted volumes, 2FA, managed firmware updates
UGREEN NASync UGOS Pro Multi-purpose NAS, hybrid storage & compute Docker, Portainer, Linux apps KVM VM support Rsync, S3, WebDAV, iSCSI, cloud sync Browser, mobile app, direct share AES-256 encryption, 2FA, frequent OTA updates

 

UniFi vs UGREEN NAS – Verdict and Conclusion

Both UGREEN and UniFi have entered the NAS sector from distinct starting points and continue to move in different directions, each targeting a particular type of user. UniFi’s UNAS series delivers consistency, predictable performance, and dependable integration with the broader UniFi ecosystem. Its software is stable, lightweight, and well-suited to users who prioritize straightforward storage management, reliable data handling, and unified control across routers, switches, and surveillance systems. While the hardware is limited to fixed ARM configurations and non-expandable memory, it is efficient, quiet, and designed for continuous operation with minimal maintenance. For organizations already invested in UniFi infrastructure, the UNAS systems provide a logical expansion that keeps management centralized and operational risk low. However, their value depends heavily on ecosystem synergy; outside of that environment, the systems remain competent but relatively inflexible standalone NAS options.

UGREEN’s NASync platform, on the other hand, appeals to users seeking broader performance capability and independence. Its x86-based models, upgradable memory, and open software environment allow it to serve as a hybrid between NAS and compact server, capable of running applications, containers, and virtual machines alongside storage tasks. The design language is more suited to individual or small business use than datacenter deployment, but the hardware range—from ARM to Core i5—covers a far wider performance spectrum than UniFi’s. Software maturity continues to evolve quickly, with new features added frequently, and the systems provide extensive compatibility with third-party clients and backup services. The trade-off is that long-term reliability and enterprise-level security validation are still developing.

Ultimately, UniFi NAS suits users who already rely on UniFi’s networking ecosystem and value simplicity, predictability, and centralized management, while UGREEN NAS caters to those prioritizing flexibility, compute power, and open software capability. Both brands have lowered the entry barrier into reliable NAS ownership, but they embody opposing philosophies: UniFi focuses on integration and control, whereas UGREEN emphasizes capability and independence.

Why Buy UniFi NAS?

Why Buy UGREEN NAS?

  • Ecosystem Integration: Seamlessly integrates with UniFi Network, Protect, and Access systems, allowing unified management through a single controller interface.

  • Centralized Management: Designed for administrators managing multiple UniFi sites or devices, providing consistent firmware, remote access, and monitoring from one dashboard.

  • Reliable, Efficient Design: ARM-based architecture ensures low power draw, cool operation, and stable long-term performance with minimal maintenance.

  • Enterprise-Grade Networking: Equipped with up to dual 10G SFP+ and 10GBase-T ports, plus USP-RPS redundancy for professional deployments.

  • Proven Security Framework: Benefits from Ubiquiti’s mature network security infrastructure, signed firmware updates, and NDAA-compliant hardware.

  • Superior Hardware Performance: Offers a full range from ARM to Intel Core i5 CPUs, with upgradable RAM, NVMe storage pools, and optional PCIe expansion.

  • Versatile Software (UGOS Pro): Supports Docker, virtual machines, AI photo indexing, and multi-platform backups out of the box.

  • All-in-One Standalone System: Functions independently without relying on an external ecosystem, ideal for users wanting a complete server in one unit.

  • Advanced Connectivity: Includes 2.5 GbE and 10 GbE networking, USB 4/Thunderbolt 4, and support for direct-attached workflows like video editing or large-file transfer.

  • Rapid Development and Updates: Frequent firmware releases continually add new features, broader hardware support, and improved backup and security options.

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Terramaster F4-425 PLUS NAS Review

Par : Rob Andrews
22 octobre 2025 à 18:00

The Terramaster F4-425 PLUS NAS Review – The New $500+ NAS Standard?

The TerraMaster F4-425 Plus represents a significant step forward in the brand’s 4-bay NAS lineup, targeting users who demand capable hardware and broad feature support at a mid-range price point. Retailing at $569.99, or $484.99 during its introductory discount, it is positioned to compete directly with systems like the Synology DS925+ and QNAP TS-464, both of which occupy similar price and hardware tiers. TerraMaster’s intention with this model is to deliver a “jack of all trades” device that suits both home multimedia environments and small business offices. Internally, it uses Intel’s quad-core N150 processor, part of the newer Twin Lake architecture, with a base clock of 1 GHz and a turbo frequency up to 3.6 GHz. This CPU is paired with 16GB of DDR5 memory, offering a notable upgrade in bandwidth and responsiveness compared to previous DDR4-based TerraMaster models.

Complementing that performance core are three PCIe 3.0 x1 M.2 NVMe slots and four SATA drive bays, supporting a combined raw capacity of up to 144TB when fully populated. This configuration allows the device to accommodate both large-scale HDD storage for bulk data and high-speed SSD arrays for caching or dedicated performance pools. Dual 5GbE network ports on the rear enable theoretical aggregate transfer speeds exceeding 1,000 MB/s, aligning with the system’s positioning as a performance-focused yet affordable NAS. TerraMaster’s TOS 6 operating system comes preinstalled, providing modernized storage management, AI-based photo organization, and security tools like HyperLock WORM protection and isolation mode. Altogether, the F4-425 Plus arrives as one of the most fully featured mid-tier NAS options available in 2025, combining strong hardware, software maturity, and quiet, power-efficient design suited to both personal and professional use cases.

The Terramaster F4-425 PLUS NAS Review – Quick Conclusion

The TerraMaster F4-425 Plus delivers one of the most complete mid-tier NAS packages currently available, balancing strong hardware, efficient design, and flexible software at a highly competitive price. Its Intel N150 processor, 16GB of DDR5 memory, and dual 5GbE ports provide ample speed for data-heavy workloads, while three M.2 NVMe slots add rare versatility for caching or SSD-based pools. The all-metal enclosure maintains low temperatures and quiet operation, and the TOS 6 operating system has matured into a capable platform with snapshot protection, Docker, virtualization, and AI photo management. Although it lacks premium details such as drive locks and redundant fans, and the interface remains less refined than Synology DSM or QNAP QTS, the F4-425 Plus stands out as a practical and forward-looking NAS. It bridges affordability and professional capability, making it suitable for home users, content creators, and small offices that need reliable, fast, and adaptable network storage.

SOFTWARE - 7/10
HARDWARE - 9/10
PERFORMANCE - 8/10
PRICE - 9/10
VALUE - 10/10


8.6
PROS
👍🏻• Dual 5GbE network ports with full independent bandwidth for high-speed transfers + lots of USB-to-5GbE $30 upgrades in the market now
👍🏻• Three PCIe 3.0 x1 M.2 NVMe slots supporting cache or storage pool configurations
👍🏻• Intel N150 processor with integrated graphics enabling 4K hardware decoding and AES-NI encryption
👍🏻• 16GB DDR5 memory (expandable to 32GB) offering improved bandwidth and multitasking performance
👍🏻• Full-metal chassis with efficient thermals, low noise levels, and minimal vibration
👍🏻• Comprehensive RAID and storage management through TOS 6 with snapshot and HyperLock-WORM protection
👍🏻• Supports Docker, virtual machines, Plex, Emby, and Jellyfin natively within TOS 6
👍🏻• Competitive pricing with strong value relative to Synology and QNAP alternatives
CONS
👎🏻• Cheaper N150 NAS Systems have arrived earlier in 2025
👎🏻• 5GbE adoption is low, so only larger 10GbE ready groups (via auto-negotiation) will enjoy the benefits of 5GbE
👎🏻• TOS 6 interface and app ecosystem remain less polished than top-tier NAS platforms


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Terramaster F4-425 PLUS NAS
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The Terramaster F4-425 PLUS NAS Review – Design & Storage

The exterior design of the TerraMaster F4-425 Plus maintains the brand’s familiar compact metal chassis but introduces small refinements that improve both usability and thermals. Measuring 150 by 181 by 219 millimeters and weighing just under 3 kilograms, it fits comfortably into a home office or studio setup without generating significant heat or noise. The enclosure is almost entirely metal, with a brushed silver finish that enhances rigidity and passive cooling compared with earlier plastic-faced designs. Four individual drive trays occupy the front panel, each featuring a simple click-and-load mechanism for 3.5-inch or 2.5-inch drives. Although there are no locking latches or LCD displays, the trays are tool-free and straightforward to handle. A single 120mm fan at the rear provides adjustable cooling across smart, low, and high-speed profiles, maintaining an operational noise level as low as 20.9 dB(A) when idle with drives installed, according to TerraMaster’s own test figures.

From a structural perspective, the F4-425 Plus has clearly benefited from improved thermal management. The metal shell acts as a heat spreader, with typical external temperatures ranging from 25 to 27°C across the enclosure after extended operation, even under multi-day workload testing. Internal drive bays were observed to maintain around 27 to 29°C, while the rear ports and fan area registered between 36 and 38°C during prolonged use. These figures indicate an efficient heat dissipation design, aided by the more conductive chassis material and smart fan calibration. For users concerned with energy efficiency, the power draw remains modest thanks to the Intel N150 processor’s low TDP, allowing the system to idle at roughly 13 watts with SSDs installed and scale to around 60 watts under sustained load with four enterprise-class HDDs spinning.

In terms of drive configuration, the NAS supports up to four SATA 6Gb/s drives and three M.2 2280 NVMe SSDs. This combination provides a theoretical maximum raw capacity of 144TB, assuming four 30TB HDDs and three 8TB SSDs. The inclusion of three NVMe slots rather than the more typical one or two is a notable strength. Each operates on a PCIe 3.0 x1 lane, delivering real-world throughput of approximately 800 to 900 MB/s per SSD, suitable for caching or storage pools. This setup makes it possible to allocate two drives for cache acceleration while dedicating the third to an independent SSD-based pool for high-speed operations like video editing or database hosting. Such flexibility is rare at this price point and broadens the system’s appeal to users with both large data sets and high-performance requirements.

Storage management is handled through TOS 6, TerraMaster’s web-based operating system, which supports a wide range of RAID configurations including TRAID, TRAID+, JBOD, and traditional RAID 0, 1, 5, 6, and 10. TOS 6 also enables SSD caching, snapshots, and HyperLock write-once-read-many functionality for data integrity. Users can assign storage pools to specific workloads, such as separating SSD-based scratch space from HDD archival volumes. Combined with the new graphical interface and more detailed health monitoring tools, it provides a much more transparent overview of drive temperatures, utilization, and S.M.A.R.T. status. For additional flexibility, the system supports online RAID migration and expansion, meaning users can start small and scale capacity over time without data loss.

Beyond local storage, the device integrates directly with TerraMaster’s CloudSync service, which connects to providers like Google Drive, OneDrive, Dropbox, and Baidu Cloud. Hybrid storage configurations allow partial replication or tiered backup between the NAS and the cloud, offering an extra level of redundancy for professional workflows. External connectivity through USB 3.2 ports also supports direct backups to DAS enclosures or portable drives. Altogether, the F4-425 Plus’s design emphasizes efficient cooling, solid construction, and versatile storage architecture, making it a flexible foundation for both data-heavy projects and long-term digital archiving.

The Terramaster F4-425 PLUS NAS Review – Internal Hardware

Internally, the TerraMaster F4-425 Plus is structured around Intel’s N150 processor, a 4-core, 4-thread CPU from the Twin Lake generation. Built on a 6W TDP architecture, this chip delivers a significant efficiency advantage over the previous N5095-based systems while offering a higher burst clock of up to 3.6 GHz. The CPU integrates Intel UHD Graphics, allowing 4K hardware decoding for H.264, H.265, VC-1, and MPEG-4, which is particularly beneficial for Plex, Emby, or Jellyfin users who want native transcoding without GPU add-ons.

This combination makes the system viable not only as a file server but also as a local multimedia hub, capable of decoding and streaming 4K video at up to 60 frames per second. Despite being a low-power chip, its instruction set includes AES-NI hardware encryption, ensuring efficient data security without notable throughput loss when encryption is enabled.

The system’s memory architecture uses a single DDR5 SO-DIMM slot, populated with a 16GB non-ECC module by default and expandable up to 32GB. The adoption of DDR5 over DDR4 marks a generational improvement in bandwidth and latency, leading to faster multitasking, smoother virtualization performance, and reduced overhead when handling multiple users or services. The memory module is non-ECC but benefits from on-die error correction at the hardware level, offering stability improvements over standard DDR4 implementations. This approach aligns with the unit’s target demographic of small offices, creators, and advanced home users who want server-grade responsiveness without enterprise complexity.

Storage connectivity within the system is distributed between four SATA III 6Gb/s interfaces managed by an ASMedia controller and three PCIe 3.0 x1 lanes dedicated to M.2 NVMe SSDs. This configuration ensures balanced throughput for simultaneous HDD and SSD activity. Internally, the layout is straightforward, providing easy access to both the memory slot and M.2 bays via the removable top panel. The power supply is a single 90W external brick, keeping internal temperatures lower and simplifying maintenance.

Together, the hardware configuration represents a thoughtful balance between efficiency, expandability, and performance, aimed at users who need consistent data access, multimedia capabilities, and reliable long-term operation without excess noise or heat.

Component Details
Processor Intel N150 Quad-Core (1.0 GHz base, up to 3.6 GHz burst)
Architecture x86 64-bit, Intel Twin Lake
Hardware Encryption AES-NI engine
Hardware Transcoding H.264, H.265, VC-1, MPEG-4 up to 4K 60 FPS
Memory 16 GB DDR5 non-ECC SO-DIMM (1x16GB preinstalled)
Max Memory 32 GB DDR5
Drive Bays 4 x 3.5″/2.5″ SATA 6Gb/s
NVMe Slots 3 x M.2 2280 PCIe 3.0 x1
Max Storage 120 TB (HDDs) + 24 TB (SSDs) = up to 144 TB combined
RAID Options TRAID, TRAID+, Single, JBOD, RAID 0/1/5/6/10
File Systems Btrfs, EXT4 (internal); NTFS, FAT32, HFS+, Btrfs (external)
Power Supply 90W external adapter
Cooling 1 x 120mm smart fan (adjustable)
Noise Level 20.9 dB(A) in idle
Dimensions (H x W x D) 150 x 181 x 219 mm
Weight 2.9 kg (net)
Operating Temperature 0°C to 40°C

The Terramaster F4-425 PLUS NAS Review – Ports and Connections

The TerraMaster F4-425 Plus offers a broad range of connectivity designed to meet both high-speed networking and general expansion needs. On the rear panel, two 5GbE RJ-45 network ports serve as the central performance feature. These are among the first dual 5GbE implementations in a mid-tier NAS, and each port operates through its own dedicated PCIe 3.0 x1 lane, avoiding bandwidth contention. In testing, each port achieved full theoretical throughput, confirming proper lane allocation. Users can enable link aggregation or SMB multichannel for multi-user workloads, although saturating both ports simultaneously requires fast SSD or hybrid storage configurations. These ports support IPv4/IPv6, VLAN tagging, link aggregation, and Wake-on-LAN, making the system suitable for both small office environments and direct workstation connections.

Complementing the network interfaces, the F4-425 Plus includes four USB 3.2 ports: three Type-A and one Type-C, all operating at 10Gbps. These ports can handle external DAS enclosures, UPS devices, or high-capacity backup drives. The inclusion of a front-mounted USB port improves convenience for ad hoc backups or quick file transfers, addressing a long-standing omission in earlier TerraMaster models. Additionally, an HDMI 2.1 output is positioned on the rear, though its practical use remains limited within TOS, which lacks a native display interface. It may, however, prove useful for third-party operating systems such as Unraid or TrueNAS, where direct console access or local media playback is desired.

Overall, the port layout is clean and efficient, optimized for straightforward cable management. The system’s single large fan sits adjacent to the networking array, allowing for effective airflow without excessive cable obstruction. Power is supplied through a standard barrel connector linked to an external 90W adapter, which helps reduce internal heat buildup. Though it lacks built-in 10GbE or PCIe expansion, the dual 5GbE setup provides more than enough bandwidth for its class, especially when paired with NVMe caching. Users can also connect the NAS to TerraMaster’s USB-based DAS units for storage expansion or off-site replication, offering flexibility without compromising portability or noise levels.

Connection Type Quantity / Type Details
Network Ports 2 × 5GbE RJ-45 Independent PCIe 3.0 x1 lanes, Link Aggregation and SMB Multichannel supported
USB Ports 3 × USB 3.2 Type-A, 1 × USB 3.2 Type-C 10Gbps transfer rate, supports external DAS, UPS, and peripheral devices
HDMI Output 1 × HDMI 2.1 Up to 4K 60Hz, limited TOS functionality, usable under third-party OS
Power Input 1 × DC-in (90W adapter) External PSU to minimize chassis heat
Cooling 1 × 120mm Smart Fan Adjustable speed profiles, rear-mounted
Expansion Options USB DAS expansion Supports TerraMaster DAS units for external scaling

The Terramaster F4-425 PLUS NAS Review – Tests, Noise, Heat and Power Consumption

Performance testing on the TerraMaster F4-425 Plus showed that the system comfortably meets its advertised speed class, particularly when networked over a single 5GbE connection. Using four Toshiba MG-series 7200 RPM enterprise hard drives configured in RAID 5, the system achieved full saturation of one 5GbE port during both AJA and ATTO benchmark tests, reaching consistent read and write speeds around 500 to 520 MB/s. When tested with mixed media files totaling 50.5 GB, it completed the transfer in approximately 3 minutes and 45 seconds, equating to an average throughput of about 224 MB/s.

This is a strong result for a mechanical-drive setup, reflecting efficient caching and balanced SATA bandwidth. SMB Multichannel and link aggregation are supported, though the CPU’s available PCIe lanes limit simultaneous dual-port saturation. Even so, the system handles multiple concurrent transfers and backups without a noticeable decline in throughput.

Testing with NVMe SSDs improved overall responsiveness considerably. The three M.2 2280 PCIe 3.0 x1 slots each sustained sequential transfer rates between 800 and 900 MB/s, allowing the NAS to maintain a high level of random IOPS for metadata-heavy workloads. When used as cache devices, these drives accelerated small-file transfers and application access times, especially when paired with the system’s 16GB of DDR5 memory.

TerraMaster’s TOS 6 supports flexible use of these drives, enabling independent storage pools or hybrid cache layers, depending on the task. In sustained transfers over SMB and iSCSI, the system achieved write speeds close to 950 MB/s and reads near 1020 MB/s when using SSD-based arrays, validating the advantage of dual 5GbE interfaces for all-flash or mixed-tier environments.

Power consumption during operation remained modest, aligning with the platform’s efficient design. With no hard drives installed and three SSDs active, idle draw measured around 13.3 watts. Adding four 7200 RPM HDDs increased idle power to 55 watts and full-load consumption to roughly 61–63 watts under concurrent read/write activity. These figures indicate a well-balanced design that prioritizes power efficiency without restricting performance. Fan speed settings affect both thermals and acoustics predictably: in low-speed mode, the NAS operated near 33 dB(A), while mid and high-speed profiles raised that figure to 37 and 39 dB(A) respectively. During heavy disk operations, readings peaked briefly at around 43 dB(A), which is reasonable given the metal chassis and high-RPM drives used in testing.

Thermal results further underscored the system’s stability. Surface readings from the aluminum body remained between 25°C and 27°C on average, while drive bays hovered at 28–30°C after extended workload sessions. The rear fan exhaust area reached approximately 36–38°C under sustained load. The efficient heat dispersion of the chassis prevented thermal throttling during prolonged transfers or virtualization testing, even with all seven storage devices active. This consistent temperature range indicates that TerraMaster’s choice of single-fan cooling and full-metal housing achieves a practical balance between noise, airflow, and longevity.

Test Condition Configuration Observed Results
Network Throughput (HDD RAID 5) 4 × Toshiba MG08 7200RPM HDDs ~500–520 MB/s read/write (single 5GbE port)
File Transfer Test 50.5 GB mixed media 3m 45s total, 224 MB/s average
SSD Performance 3 × NVMe Gen3 x1 800–900 MB/s per slot, ~1020 MB/s combined read
Power Consumption (Idle) 3 × SSD, no HDD 13.3 W
Power Consumption (Active) 4 × HDD, CPU ~80% 61–63 W
Noise Levels Low–High Fan Speeds 33–43 dB(A)
Temperature Range 3-day uptime, mixed load 25°C–38°C overall system temperature

The Terramaster F4-425 PLUS NAS Review – Verdict and Conclusion

The TerraMaster F4-425 Plus demonstrates how far the company’s mid-range NAS lineup has progressed in terms of hardware refinement and real-world usability. By combining Intel’s efficient N150 processor with 16GB of DDR5 memory, dual 5GbE connectivity, and triple M.2 NVMe slots, it provides a specification normally reserved for higher-priced units. The build quality, centered around a full-metal chassis and quiet cooling design, contributes to consistent thermals and low power usage even under multi-day workloads. While the design omits premium touches like drive locks or redundant fans, the emphasis on practicality and efficient cooling makes it a dependable solution for continuous operation. From a user experience perspective, the integration of TOS 6 represents TerraMaster’s most stable and capable operating system to date, offering improved security features, cloud synchronization tools, snapshot management, and flexible storage configurations that appeal to both home and small office users.

From a value standpoint, the F4-425 Plus stands out as one of the most competitively priced NAS units in its category. At $569.99, or $484.99 during the initial discount period, it delivers strong network and storage performance that aligns closely with rivals from Synology and QNAP while retaining open installation flexibility for third-party platforms such as Unraid or TrueNAS. Its combination of high-speed connectivity, compact design, and mature software environment makes it an appealing option for anyone seeking a 4-bay system capable of multitasking across media streaming, data backup, and light virtualization. Although it cannot fully match the polish of Synology DSM or the plugin ecosystem of QNAP QTS, TerraMaster has successfully positioned this device as a bridge between affordability and professional performance, solidifying its place as one of the more balanced NAS releases of 2025.

Terramaster F4-425 PLUS NAS
Amazon in Your Region for the Terramaster F4 SSD NAS @ $569 ($489.99 till 19th Nov) Terramaster F4-425 PLUS – $569 B&H for the Terramaster F4-425 plus NAS @ $569.99
Terramaster F4-425 PLUS NAS PROs Terramaster F4-425 PLUS NAS CONs
• Dual 5GbE network ports with full independent bandwidth for high-speed transfers + lots of USB-to-5GbE $30 upgrades in the market now
• Three PCIe 3.0 x1 M.2 NVMe slots supporting cache or storage pool configurations
• Intel N150 processor with integrated graphics enabling 4K hardware decoding and AES-NI encryption
• 16GB DDR5 memory (expandable to 32GB) offering improved bandwidth and multitasking performance
• Full-metal chassis with efficient thermals, low noise levels, and minimal vibration
• Comprehensive RAID and storage management through TOS 6 with snapshot and HyperLock-WORM protection
• Supports Docker, virtual machines, Plex, Emby, and Jellyfin natively within TOS 6
• Competitive pricing with strong value relative to Synology and QNAP alternatives
• Cheaper N150 NAS Systems have arrived earlier in 2025
• 5GbE adoption is low, so only larger 10GbE ready groups (via auto-negotiation) will enjoy the benefits of 5GbE
• TOS 6 interface and app ecosystem remain less polished than top-tier NAS platforms

 

 

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Terramaster F4-425 PLUS and F2-425 PLUS NAS News

Par : Rob Andrews
17 octobre 2025 à 18:00

Terramaster F4-425 PLUS (and F2-425 PLUS) NAS Coming Soon

The Terramaster F2-425 PLUS (8 GB, priced around US$399) and F4-425 PLUS (16 GB, priced around US$569) represent Terramaster’s latest step forward in its midrange NAS portfolio, arriving near the end of 2025 as a response to the growing competition from brands such as QNAP, Synology, UGREEN, and Asustor. Both models share the same Intel N150 quad-core processor running up to 3.6 GHz, use DDR5 memory, and include multiple M.2 NVMe slots, positioning them well above Terramaster’s previous generation of Celeron-based systems. The F4-425 PLUS is a four-bay platform that expands on the two-bay F2-425 PLUS by offering higher throughput and significantly greater storage flexibility, making it suitable for heavier workloads and multi-user environments. Terramaster appears to have used this release to redefine what can be expected in the $400–$600 NAS tier, especially by including dual 5 GbE network ports, three NVMe SSD slots, and native hardware transcoding for 4K and even 8K content through integrated Intel UHD graphics. Together these systems aim to deliver competitive all-in-one solutions for home and small-office users who require reliable local backup, multimedia streaming, and virtualization support without moving into enterprise-grade pricing.

Note – The Terramaster F4-425 PLUS and F2-425 PLUS NAS have now been launched, and are available to buy HERE for $569 and HERE for $399 (with 15% off as an introductory price till November 21st)

Terramaster F4-425 PLUS & F2-425 PLUS NAS Hardware Specifications

Terramaster’s F2-425 PLUS and F4-425 PLUS NAS units share a unified hardware architecture centered on Intel’s N150 processor, part of the Twin Lake family. This 4-core, 4-thread CPU operates at a base clock of 1.0 GHz and boosts up to 3.6 GHz, with integrated Intel UHD graphics that support hardware acceleration for 4K and 8K video decoding. While the N150 is not a high-power processor by desktop standards, it provides excellent balance between performance and efficiency for NAS workloads such as Plex or Jellyfin media streaming, file indexing, and lightweight virtualization. The use of this chip also aligns Terramaster’s lineup with newer offerings from competitors who have adopted similar architectures in their 2025 models.

The memory configuration has moved to DDR5, marking a notable generational shift from the DDR4 modules used in previous Terramaster systems. The F2-425 PLUS includes 8 GB of DDR5, while the F4-425 PLUS doubles this to 16 GB, both expandable up to 32 GB. DDR5 provides higher bandwidth and reduced latency, which benefits multitasking environments, particularly when running Docker containers, multiple user sessions, or AI-driven indexing services such as local photo recognition. This upgrade positions the new PLUS series closer to the performance levels found in more expensive NAS systems while maintaining efficient power draw and thermal output. In terms of storage capacity, the F4-425 PLUS can house up to four 3.5-inch or 2.5-inch SATA drives, while the smaller F2-425 PLUS accommodates two. Both models also integrate three M.2 NVMe slots, allowing up to 8 TB per SSD and enabling users to reach a maximum combined capacity of approximately 144 TB in the four-bay model. Terramaster’s hybrid storage design allows these NVMe drives to serve either as a dedicated storage pool or as cache acceleration for HDD volumes, giving users flexibility to prioritize capacity or performance. The inclusion of three M.2 slots is unusual at this price tier and stands out against most two- and four-bay competitors, which typically provide only two.

For network connectivity, Terramaster has equipped both models with dual 5 GbE ports. This configuration effectively doubles the throughput available in the previous 2.5 GbE generation and can deliver an aggregated bandwidth of up to 10 Gbps through link aggregation. Although the lack of a dedicated 10 GbE port might limit direct single-link transfers, the two 5 GbE ports provide redundancy, failover, and multi-user performance advantages. Both models also include a front-mounted USB-C port and rear USB 3.2 Gen 2 Type-A connectors for high-speed external backups and peripheral connections, reflecting a refinement in Terramaster’s chassis design compared with earlier models that relied solely on rear ports.

Cooling and chassis design remain consistent with Terramaster’s recent metal-based enclosures, using active fan ventilation with independent drive bay access. The F4-425 PLUS features dual rear fans to maintain airflow across four bays, while the F2-425 PLUS employs a single high-efficiency unit. The new layout provides improved front-to-rear ventilation and easier access to drive trays. Internally, the systems do not include a PCIe expansion slot, which limits the potential for GPU or high-speed NIC upgrades but simplifies internal lane allocation for the CPU’s nine available PCIe lanes. Terramaster appears to have distributed these lanes between the three M.2 interfaces and dual network controllers to maintain balanced throughput across all functions.

Specification F2-425 PLUS F4-425 PLUS
Processor Intel N150 Quad-Core (up to 3.6 GHz) Intel N150 Quad-Core (up to 3.6 GHz)
Graphics Intel UHD Graphics (4K/8K decoding) Intel UHD Graphics (4K/8K decoding)
Memory 8 GB DDR5 (expandable to 32 GB) 16 GB DDR5 (expandable to 32 GB)
Drive Bays 2 x 3.5″/2.5″ SATA + 3 x M.2 NVMe 4 x 3.5″/2.5″ SATA + 3 x M.2 NVMe
Maximum Capacity Up to 88 TB (2 x 30 TB HDD + 3 x 8 TB NVMe) Up to 144 TB (4 x 30 TB HDD + 3 x 8 TB NVMe)
Network Ports 2 x 5 GbE (Link Aggregation Supported) 2 x 5 GbE (Link Aggregation Supported)
USB Ports 1 x USB-C, 2 x USB 3.2 Gen 2 Type-A 1 x USB-C, 2 x USB 3.2 Gen 2 Type-A
Operating System TOS 6.0 TOS 6.0
Cooling 1 x Smart Fan 2 x Smart Fans
Power Consumption ~20 W (Idle) ~35 W (Idle)
Price (Approx.) US$399 US$569

 

How the F4-425 PLUS Compares with QNAP TS-464 and Synology DS425+

The QNAP TS-464 is built around the Intel Celeron N5095, a 4-core, 4-thread processor that can boost up to 2.9 GHz, and ships with 8 GB of DDR4 memory. It supports four SATA bays plus M.2 expansion and includes dual 2.5 GbE ports that can be aggregated for improved bandwidth. QNAP’s system benefits from a mature software ecosystem, offering HDMI output, virtualization support, and extensive backup tools. In performance testing, it delivers sequential speeds around 560 MB/s under RAID 5, limited mainly by network bandwidth. Compared with the F4-425 PLUS, the TS-464 offers stronger software flexibility and PCIe expandability, but its networking hardware is slower and it relies on older memory standards.

The Synology DS425+ takes a more conservative hardware route, using the Intel Celeron J4125 with four cores running at 2.0 GHz base and 2.7 GHz burst. It includes 2 GB of DDR4 memory, expandable to 6 GB, and offers one 2.5 GbE port alongside a 1 GbE port. Two M.2 NVMe slots are available but only for cache acceleration, not full storage pools. Sequential throughput typically reaches about 280 MB/s for reads and writes. Against the F4-425 PLUS, Synology’s system trails in memory, raw processing speed, and throughput potential, but maintains an advantage in software polish and long-term reliability through DSM integration.

In side-by-side terms, the F4-425 PLUS aims for a higher performance envelope. Its dual 5 GbE ports deliver aggregate throughput potential far beyond both the QNAP and Synology options, and its DDR5 memory with three M.2 NVMe slots allows flexible caching or tiered storage setups uncommon at this price tier. The trade-off lies in expandability and software maturity, where QNAP’s platform remains more modular and Synology’s DSM ecosystem offers more stability. For users focused on performance-per-dollar, the F4-425 PLUS introduces hardware that surpasses both competitors on paper, though long-term evaluation will depend on software development under TOS 6.

Feature F4-425 PLUS QNAP TS-464 Synology DS425+
CPU Intel N150 (4 cores, up to 3.6 GHz) Intel Celeron N5095 (4 cores, up to 2.9 GHz) Intel Celeron J4125 (4 cores, up to 2.7 GHz)
Memory 16 GB DDR5 (expandable to 32 GB) 8 GB DDR4 (expandable) 2 GB DDR4 (expandable to 6 GB)
Drive Bays + NVMe 4 SATA + 3 M.2 NVMe 4 SATA + 2 M.2 NVMe (plus PCIe slot) 4 SATA + 2 M.2 NVMe (cache only)
Network 2 × 5 GbE 2 × 2.5 GbE 1 × 2.5 GbE + 1 × 1 GbE
Throughput Up to 1,010 MB/s Up to 560 MB/s Up to 280 MB/s
Expansion / PCIe No PCIe slot PCIe slot for add-on cards No PCIe slot
Ecosystem Strength TOS 6, expanding app support Mature QNAP QTS ecosystem Mature DSM ecosystem

Terramaster TOS 6 Software

The F2-425 PLUS and F4-425 PLUS both ship with TOS 6, Terramaster’s latest operating system that replaces the earlier TOS 5 platform across its new generation of NAS hardware. TOS 6 introduces a redesigned interface with improved responsiveness and a more modular layout intended to reduce latency during multitasking.

It expands Terramaster’s range of built-in applications to include enhanced TRAID and TRAID+ hybrid array configurations, snapshot scheduling, and real-time data synchronization features. Backup utilities such as Duple Backup, Centralized Backup, TerraSync, and CloudSync provide integration across local drives, offsite NAS devices, and major cloud providers. The system also integrates hardware-assisted AES-NI encryption, supporting secure data transmission over 256-bit TLS and optional two-factor authentication. Although its design remains more lightweight than QNAP’s QTS or Synology’s DSM, it is notably faster to load and more accessible to new users.

Beyond core management tools, TOS 6 also incorporates AI-assisted photo management and multimedia indexing designed to run locally rather than relying on external cloud resources. Its facial, object, and scene recognition algorithms operate entirely on the NAS, avoiding external data transfers while maintaining privacy for personal collections. The OS additionally supports Docker and VirtualBox, enabling light virtualization tasks or deployment of third-party services without command-line setup.

Multimedia servers such as Plex, Emby, and Jellyfin can use Intel’s integrated graphics for hardware decoding, improving playback efficiency in 4K and 8K environments. While TOS 6 still trails mature ecosystems in app diversity, it delivers steady progress toward matching more established competitors, particularly for backup, synchronization, and AI-driven photo organization.

Verdict? The New4-Bay NAS Score to Beat?

The Terramaster F2-425 PLUS and F4-425 PLUS introduce a considerable upgrade to the company’s mid-tier NAS range, setting new expectations for what users can expect at the $400–$600 level. Both models adopt the Intel N150 processor, DDR5 memory, and dual 5 GbE networking, bringing performance that previously required higher-priced hardware. The F4-425 PLUS, in particular, combines four SATA bays with three M.2 NVMe slots, creating one of the most storage-flexible designs in its category. This configuration makes it a practical option for users who require hybrid pools or tiered caching but prefer to remain within consumer-level power and cost limits. Terramaster’s decision to include high-speed networking and DDR5 support at this price point demonstrates an emphasis on raw throughput and bandwidth efficiency, although it comes at the expense of PCIe expandability. From a broader market perspective, the F4-425 PLUS positions Terramaster competitively against alternatives from QNAP and Synology, trading ecosystem maturity for stronger base hardware. TOS 6 continues to evolve, offering usable AI-based media tools, secure backup systems, and local synchronization features. The platform still lacks some advanced management functions and third-party integrations seen in more established ecosystems, yet it now provides sufficient stability and depth for both professional and enthusiast users. Overall, the F4-425 PLUS presents an incremental but strategically significant advancement in Terramaster’s NAS design philosophy, marking a shift toward higher efficiency and versatility within its compact, consumer-oriented systems.

Terramaster F4-425 PLUS NAS – $569

(15% OFF at Launch till 19th Nov)

Terramaster F2-425 PLUS NAS – $399

(15% OFF at Launch till 19th Nov)

 

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Need Advice on Data Storage from an Expert?

Finally, for free advice about your setup, just leave a message in the comments below here at NASCompares.com and we will get back to you. Need Help? Where possible (and where appropriate) please provide as much information about your requirements, as then I can arrange the best answer and solution to your needs. Do not worry about your e-mail address being required, it will NOT be used in a mailing list and will NOT be used in any way other than to respond to your enquiry. [contact-form-7] TRY CHAT Terms and Conditions
If you like this service, please consider supporting us. We use affiliate links on the blog allowing NAScompares information and advice service to be free of charge to you.Anything you purchase on the day you click on our links will generate a small commission which isused to run the website. Here is a link for Amazon and B&H.You can also get me a ☕ Ko-fi or old school Paypal. Thanks!To find out more about how to support this advice service check HEREIf you need to fix or configure a NAS, check Fiver Have you thought about helping others with your knowledge? Find Instructions Here  
 
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Alternatively, why not ask me on the ASK NASCompares forum, by clicking the button below. This is a community hub that serves as a place that I can answer your question, chew the fat, share new release information and even get corrections posted. I will always get around to answering ALL queries, but as a one-man operation, I cannot promise speed! So by sharing your query in the ASK NASCompares section below, you can get a better range of solutions and suggestions, alongside my own.

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