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Asustor Lockerstor 4 Gen 2+ NAS Review

Par : Rob Andrews
27 février 2026 à 18:00

Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Hardware Review, Worth Your Data?

Asustor has always sat slightly off to one side of the mainstream NAS conversation. It does not chase the same marketing angles as the bigger names, but it has consistently tried to combine features that other brands often keep separated by model tier. The Lockerstor series is a good example of that approach, mixing prosumer hardware touches such as a metal chassis, HDMI output and multiple SSD bays with a fairly traditional four bay NAS layout. The Lockerstor 4 Gen2+ is not a clean-slate redesign. Instead, it is a mid-range refresh of the existing Lockerstor 4 Gen2, built on the same underlying platform. The CPU remains the Intel Celeron N5095, memory starts at 4 GB of DDR4, the four internal M.2 NVMe slots are unchanged, and the chassis and physical layout are effectively identical. The meaningful update in this revision is networking, with the Gen2+ moving from dual 2.5GbE ports to dual 5GbE. That change is intended to raise the usable network headroom for single users and small teams, particularly where SSD caching or multiple clients are involved, without forcing buyers straight into 10GbE. At the same time, the broader market has moved on since the original Gen2 launched. 2.5GbE is now common at this price point, and the N5095, while still stable and capable, is no longer the standout CPU it was in 2022 and 2023, with newer low power Intel platforms offering better efficiency and raw performance. Taken as a whole, the Lockerstor 4 Gen2+ is best viewed as a targeted update designed to keep the existing Lockerstor platform relevant for longer. It does not attempt to redefine what a mid-range four bay NAS should be, but instead focuses on addressing network performance as storage media and workflows continue to push beyond the limits of 2.5GbE.

Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Review, Quick Conclusion

The Lockerstor 4 Gen2+ is a competent and largely familiar system. From a hardware perspective, it remains solid, well built and flexible, with few outright weaknesses in isolation. The metal chassis, internal expandability and feature set still compare well against many competing four bay NAS systems. However, this revision does not materially change the overall character or capability of the platform beyond networking. The move from dual 2.5GbE to dual 5GbE is the defining update. For users who already have compatible network infrastructure, or who are working close to the limits of 2.5GbE with multiple clients, SSD caching or larger hard drives, this upgrade does provide tangible benefits. For others, particularly those still on gigabit or mixed networks, the improvement may be largely theoretical in day to day use. At the same time, the unchanged use of the Intel Celeron N5095 is more noticeable now than it was at the original Gen2 launch. While it remains stable and well supported, it no longer stands out in a market where newer low power Intel CPUs offer better efficiency and performance at similar price points. Combined with pricing that now faces stronger competition, the Gen2+ feels more like a stopgap refresh than a forward looking update. Overall, the Lockerstor 4 Gen2+ is a capable NAS that makes sense primarily for users who value its physical design, internal expandability and Asustor’s flexible hardware policy, and who can take advantage of 5GbE networking today. It is less compelling as a general upgrade for existing Gen2 owners, or as a default recommendation in a crowded mid-range market.

SOFTWARE - 6/10
HARDWARE - 7/10
PERFORMANCE - 7/10
PRICE - 6/10
VALUE - 7/10


6.6
PROS
👍🏻Dual 5GbE networking provides higher aggregate and single client throughput than 2.5GbE when supported by the surrounding network
👍🏻Four internal M.2 NVMe slots allow SSD caching, SSD storage pools, or mixed configurations without sacrificing SATA bays
👍🏻Solid metal chassis and metal drive trays provide durability and assist passive heat dissipation
👍🏻HDMI output with Asustor Portal enables direct media playback, VM interaction and local management without a client PC
👍🏻Supports both EXT4 and Btrfs, including snapshot functionality for basic data protection and recovery
👍🏻PCIe expansion slot allows future upgrade to 10GbE, extending the usable lifespan of the system
👍🏻Flexible storage configuration, including use of NVMe drives as independent storage pools rather than cache only
👍🏻Hardware warranty remains valid when installing third party NAS operating systems, supporting advanced and DIY users
CONS
👎🏻Intel Celeron N5095 is now dated relative to newer low power CPUs available at similar price points (eg N100, N150, N355, etc) right now
👎🏻ADM software is stable but lacks the depth, automation and flagship features found on some competing platforms
👎🏻PCIe slot is shared between NVMe carrier and expansion cards, forcing a choice without a compatible combo card
👎🏻Pricing faces stronger competition in 2026, reducing its appeal as a default mid range NAS option

Where to Buy a Product
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Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Review, Design

The physical design of the Lockerstor 4 Gen2+ is effectively unchanged from the earlier Gen2 model. Asustor has retained the same chassis, dimensions and layout, making this revision visually indistinguishable from its predecessor. This is a deliberate choice rather than an oversight, and it reflects Asustor’s preference for continuity in this product line.

The enclosure is almost entirely metal, including the outer shell and the individual drive trays. This gives the unit a robust, industrial feel and contributes to passive heat dissipation. It also differentiates the Lockerstor from many competing four bay NAS systems that rely more heavily on plastic for cost and noise reduction. The trade-off remains increased vibration and audible resonance when using higher capacity, faster spinning hard drives.

On the front of the unit, the Lockerstor retains its LCD display, a feature that has largely disappeared from this segment. The display provides system status information such as IP addresses, temperature readings and alert notifications. Beyond basic monitoring, it can also be used for initial system setup, allowing the NAS to be configured without a connected computer. While this will not replace web based administration for ongoing management, it remains useful for rapid deployment and troubleshooting, particularly when network access is limited.

Status LEDs are present alongside the display and drive bays, offering basic activity indicators. These are functional but secondary to the information provided by the LCD panel. A front mounted USB port with a dedicated copy button is also retained. This supports both manual and automatic backup tasks and has been upgraded in earlier Gen2 models to USB 3.2 Gen 2, allowing higher speed transfers to and from external storage devices.

The drive trays themselves are metal, ventilated and feature a locking mechanism. They support both 3.5 inch and 2.5 inch SATA drives and allow hot swapping where the configuration permits. The tray design prioritizes rigidity and airflow over acoustic dampening, which again reinforces the Lockerstor’s server-like character rather than a living room friendly one.

Ventilation is handled through a combination of tray perforation, side vents and a large rear mounted cooling fan. There have been minor adjustments over successive revisions to improve airflow around the M.2 area, but the overall cooling approach remains conservative and tuned for reliability rather than silence.

In summary, the design of the Lockerstor 4 Gen2+ will appeal to users who value durability, serviceability and physical controls. It does not attempt to modernize its appearance or reduce its footprint, and buyers sensitive to noise or aesthetics should be aware of the compromises that come with this design philosophy.

Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Review, Ports and Connections

The rear connectivity of the Lockerstor 4 Gen2+ closely resembles that of the earlier Gen2 model, with one important exception. The dual 2.5GbE ports have been replaced with dual 5GbE Ethernet, which represents the core purpose of this refresh. Everything else in the port layout remains largely the same, reinforcing that this is a targeted update rather than a rework of the platform.

The two 5GbE ports support standard Ethernet features including link aggregation and SMB Multichannel. In practical terms, this allows higher aggregate throughput when multiple clients are accessing the NAS simultaneously, or improved single client performance in supported environments. Asustor positions this as offering near 10GbE class performance without the cost or infrastructure demands of full 10GbE. In reality, the benefits depend heavily on the surrounding network hardware, client support and workload type. Users without compatible switches or clients will see little immediate advantage over 2.5GbE.

Alongside the Ethernet ports, the Lockerstor 4 Gen2+ retains its HDMI output. This is used with Asustor Portal, a parallel interface that allows direct interaction with media playback, virtual machines and containerized applications when the NAS is connected to a display. Unlike some competing implementations, this HDMI output is actively supported, though it remains a secondary interface compared to the browser based ADM environment. Two rear USB ports provide USB 3.2 Gen 2 connectivity for high speed external storage, adapters and peripherals.

A PCIe expansion slot is also present and remains an important part of the Lockerstor design. In the Gen2+ series, this slot is described as no longer proprietary, allowing broader compatibility with third party 10GbE network cards. This adds flexibility for users who expect to outgrow 5GbE in the future, although it still requires choosing between PCIe expansion and the preinstalled M.2 carrier board.

The combination of four SATA bays, four internal NVMe slots and dual 5GbE networking provides sufficient internal and external bandwidth for many small office and creative workloads. However, it is worth noting that modern hard drives and NVMe SSDs can quickly approach or exceed the limits of a single 5GbE connection. In environments where sustained maximum throughput is a priority, the optional move to 10GbE may still be the more appropriate long term choice.

Overall, the port selection on the Lockerstor 4 Gen2+ is well rounded and flexible. The addition of dual 5GbE meaningfully updates the networking capability of the system, but it does not fundamentally change how the device integrates into a network compared to the earlier Gen2.

Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Review, Internal Hardware

Internally, the Lockerstor 4 Gen2+ is almost identical to the earlier Gen2 model. Asustor has not revised the core platform, and the internal layout, controller architecture and expansion approach remain the same. This consistency simplifies evaluation, but it also makes the age of some components more apparent in the current market.

The system is powered by the Intel Celeron N5095, a quad core processor based on Intel’s Jasper Lake architecture. At launch, this CPU was widely adopted in mid range NAS systems due to its balance of power consumption, integrated graphics and general purpose performance. It operates at a 2.0 GHz base frequency with burst speeds up to 2.9 GHz. In 2026 terms, the N5095 is no longer a standout choice. Newer low power Intel CPUs offer improved efficiency and stronger CPU side performance at similar price points, particularly for non media workloads.

The presence of integrated graphics remains relevant for hardware assisted video transcoding and HDMI based output, and the N5095 continues to handle typical NAS tasks, light virtualization and container workloads without issue. However, users planning heavier multi VM deployments or CPU intensive services may find the platform limiting compared to more recent alternatives.

Memory configuration starts at 4 GB of DDR4 2933 MHz SODIMM memory and can be expanded up to 16 GB. This is sufficient for most file serving, backup and multimedia tasks, and provides some headroom for virtualization and containers. ECC memory is not supported, which is worth noting given the pricing and the comparison to some competing systems in this segment.

One of the defining features of the Lockerstor platform remains the inclusion of four M.2 NVMe SSD slots. These support 2280 form factor drives and operate over PCIe Gen3. The slots can be used for SSD caching, dedicated storage pools, or a mixture of both, offering flexibility that is not universally available in this class. The practical throughput per slot is lower than modern x4 NVMe drives can deliver, but still significantly higher than SATA SSDs and more than sufficient for caching and high IOPS workloads. The NVMe slots are mounted on a dedicated PCIe carrier board that occupies the system’s expansion slot. This design choice means users must choose between using the four M.2 slots and installing a PCIe network card, unless a compatible combination card is used. While workable, it remains a compromise that should be considered when planning long term upgrades.

Overall, the internal hardware of the Lockerstor 4 Gen2+ remains capable and flexible, but it is clearly rooted in an earlier generation of mid range NAS design. The networking upgrade extends its usefulness, but it does not address the broader shifts in CPU and platform expectations that have emerged since the original Gen2 release.

Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Review, Software

The Lockerstor 4 Gen2+ ships with the latest version of Asustor Data Master, commonly referred to as ADM. Functionally, the software experience is the same as on the earlier Gen2 models, with no Gen2+ specific changes or features introduced as part of this refresh. Any improvements are the result of ongoing platform updates rather than hardware driven differentiation.

ADM presents a desktop style interface accessed through a web browser, with windowed applications, user accounts and a traditional file manager. It is straightforward to navigate and generally stable in operation. Performance on the N5095 platform is consistent and predictable, with no major responsiveness issues during typical file serving, backup or media management tasks.

Asustor continues to support both EXT4 and Btrfs file systems. Btrfs brings snapshot support and data versioning for shared folders and iSCSI volumes, while EXT4 remains available for users who prefer a simpler, lower overhead file system. Snapshot Center integrates with Btrfs to provide scheduled and manual snapshots, offering basic protection against accidental deletion or ransomware scenarios.

The application ecosystem in ADM remains broad but uneven. Core first party applications for storage management, backups, media indexing and basic virtualization are present and generally reliable. However, a number of advanced functions rely heavily on third party software. Virtualization, for example, is still built around VirtualBox rather than a native hypervisor. Container support is provided through Docker and Portainer, which is flexible but assumes a degree of user familiarity.

Multimedia support is one of ADM’s stronger areas. Applications such as LooksGood, Photo Gallery and SoundsGood provide local media management and streaming, and hardware assisted video transcoding is available through the Intel integrated graphics. HDMI output via Asustor Portal runs in parallel to ADM and allows direct playback and interaction with selected applications. While this remains more fully featured than some competing HDMI implementations, it is clearly secondary to the browser based interface and receives fewer updates.

Backup and synchronization tools are comprehensive in scope. ADM supports local and remote backups via rsync, USB devices, NAS to NAS replication and a wide range of public cloud services. DataSync Center and Cloud Backup Center consolidate many of these functions into centralized tools, though configuration can feel fragmented compared to more tightly integrated platforms.

Security features have expanded steadily since earlier releases. ADM includes a firewall, automatic IP blocking, antivirus scanning through ClamAV, two step verification and encryption options for shared folders and MyArchive volumes. These features provide a reasonable baseline for small business and advanced home users, though they rely on manual configuration rather than automated policy driven protection.

Overall, the ADM software platform is stable, functional and capable of supporting a wide range of use cases. It does not stand out for innovation or advanced automation, and it lacks some of the higher level, tightly integrated services offered by competitors. For users seeking a dependable and flexible NAS operating system that prioritizes core functionality over novelty, ADM remains adequate. For those placing heavy emphasis on software features and ecosystem depth, it may feel comparatively restrained.

Asustor AS6704T v2 Lockerstor 4 Gen2+ NAS Review, Conclusion

The Lockerstor 4 Gen2+ is best understood as a maintenance refresh rather than a new generation. Asustor has taken an existing and well established platform and updated it in one specific area, network connectivity, to better align with how storage performance and workloads have evolved since the original Gen2 launch. Outside of that change, the system remains fundamentally the same device. The move to dual 5GbE does meaningfully extend the usable lifespan of the Lockerstor 4 design for users who are already constrained by 2.5GbE, particularly in multi user environments or setups that make effective use of SSD caching and faster hard drives. For those users, the Gen2+ offers a tangible improvement without the immediate cost or complexity of moving to 10GbE. For others, especially those still on gigabit or mixed networks, the practical benefit may be limited.

At the same time, the unchanged internal platform is harder to ignore in 2026. The Intel Celeron N5095 remains stable and compatible with a wide range of workloads, but it no longer compares as favourably against newer low power CPUs now appearing in similarly priced systems. Combined with increased competition across this segment, the value proposition of the Gen2+ is narrower than it was when the original Gen2 launched. The Lockerstor 4 Gen2+ will appeal most to buyers who value its physical build quality, internal expandability, flexible storage configuration and Asustor’s relatively open hardware stance, including third party OS support. It is less compelling as an upgrade for existing Gen2 owners, and it is not a clear default choice in the current mid range NAS market unless its specific strengths align with the intended use case. In short, the Gen2+ succeeds in keeping the Lockerstor platform relevant for longer, but it does not redefine it.

PROs of the Lockerstor 4 Gen 2+ NAS CONs of the Lockerstor 4 Gen 2+ NAS
  • Dual 5GbE networking provides higher aggregate and single client throughput than 2.5GbE when supported by the surrounding network

  • Four internal M.2 NVMe slots allow SSD caching, SSD storage pools, or mixed configurations without sacrificing SATA bays

  • Solid metal chassis and metal drive trays provide durability and assist passive heat dissipation

  • HDMI output with Asustor Portal enables direct media playback, VM interaction and local management without a client PC

  • Supports both EXT4 and Btrfs, including snapshot functionality for basic data protection and recovery

  • PCIe expansion slot allows future upgrade to 10GbE, extending the usable lifespan of the system

  • Flexible storage configuration, including use of NVMe drives as independent storage pools rather than cache only

  • Hardware warranty remains valid when installing third party NAS operating systems, supporting advanced and DIY users

  • Intel Celeron N5095 is now dated relative to newer low power CPUs available at similar price points (eg N100, N150, N355, etc) right now

  • ADM software is stable but lacks the depth, automation and flagship features found on some competing platforms

  • PCIe slot is shared between NVMe carrier and expansion cards, forcing a choice without a compatible combo card

  • Pricing faces stronger competition in 2026, reducing its appeal as a default mid range NAS option

 

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Terramaster F4-425 NAS – Should You Buy This NAS?

Par : Rob Andrews
16 février 2026 à 18:00

The Terramaster F4-425 Value Intel 4-Bay – Does It Deserve your Data?

The TerraMaster F4-425 is positioned as a lower cost entry point into the company’s Intel based NAS lineup for the 2025 to 2026 generation, sitting below the Plus, Pro, and Max series models. It combines a 4 bay desktop chassis with the Intel Celeron N5095, 4GB of DDR4 memory with upgrade support up to 16GB, and a single 2.5GbE network interface. This places it squarely in the middle ground between basic ARM powered NAS systems and more fully featured x86 solutions with higher network bandwidth and NVMe expansion. The appeal of the F4-425 lies in its balance rather than specialization, offering enough CPU performance for multi user file access, media streaming, and general application use, while keeping cost, noise, and power consumption relatively controlled. It is clearly designed for users who want an Intel based NAS for everyday storage and media tasks, but who do not necessarily need the higher throughput, expansion options, or future scalability found in TerraMaster’s more expensive models.

SOFTWARE - 8/10
HARDWARE - 7/10
PERFORMANCE - 6/10
PRICE - 9/10
VALUE - 8/10


7.6
PROS
👍🏻Competitive Intel-Based Value in a 4 Bay Format with the F4-425 vs other Intel Entry Systems
👍🏻Flexible Storage Management With TRAID and TRAID Plus in the F4-425
👍🏻Balanced Performance for Media and Multi-User Access of the F4-425 system
👍🏻Practical Software Feature Set With TOS 6 of the F4-425
👍🏻Flexible Platform for Turnkey or DIY NAS Use with the F4-425
CONS
👎🏻Single 2.5GbE Network Port Limits Throughput of the F4-425
👎🏻1.7 Lack of NVMe Expansion Limits Internal Performance in the F4-425
👎🏻Aging CPU Platform for a New Generation NAS of the F4-425
👎🏻HDMI Output With No Practical Software Use on the F4-425
👎🏻Overlap With Better Equipped Models in the Same Lineup of the F4-425


Where to Buy a Product
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Competitive Intel-Based Value in a 4 Bay Format with the F4-425 vs other Intel Entry Systems

One of the key advantages of the F4-425 is how it positions itself within the x86 turnkey NAS market, particularly in the 4 bay segment. Systems that combine an Intel processor, upgradeable memory, and faster than gigabit networking are typically aimed at prosumer or small business buyers and often carry a noticeably higher price. The F4-425 offers a complete, ready to use solution that includes TerraMaster’s TOS 6 operating system, allowing users to deploy storage, backups, and shared services without needing to install or license additional software.

This lowers the overall barrier to entry for buyers who want an Intel based NAS primarily for general purpose storage, media streaming, or light application hosting. While it does not compete directly with higher end 4 bay systems that include multi LAN configurations or NVMe expansion, it delivers a core x86 experience at a price level that is more approachable, especially for users who do not plan to saturate network bandwidth or push heavy virtualization workloads.

Flexible Storage Management With TRAID and TRAID Plus in the F4-425

A notable strength of the F4-425 is its support for TerraMaster’s TRAID and TRAID Plus storage systems, which are particularly relevant in a 4 bay enclosure. Traditional RAID configurations often require matched drive sizes to avoid wasted capacity, and expanding an array later can involve rebuilding or replacing multiple disks at once. TRAID reduces this rigidity by allowing mixed capacity drives to be used more efficiently over time, automatically organizing available space while maintaining redundancy.

In a 4 bay system, this becomes more practical, as users are more likely to add drives gradually or replace older disks with higher capacity models as prices fall. The result is a storage setup that is easier to grow incrementally without complex planning. For users managing a family media library, backups from multiple devices, or shared data across several users, this flexibility can simplify long term storage expansion while reducing the need for disruptive migrations.

Balanced Performance for Media and Multi-User Access of the F4-425 system

The F4-425 offers a level of performance that is generally well suited to shared home or small office environments, particularly where multiple users are accessing data simultaneously. The Intel Celeron N5095 provides enough processing headroom to handle file transfers, background services, and media applications without the system feeling unresponsive under light to moderate load. In a 4 bay configuration, this performance profile pairs well with mixed workloads, such as ongoing backups, media indexing, and concurrent playback through applications like Plex, Emby, or Jellyfin using hardware assisted 4K decoding. While it is not intended for heavy virtualization or sustained high throughput tasks, the F4-425 can comfortably support several users accessing files or streaming content at the same time. This makes it suitable for households or teams where shared access and consistency are more important than peak benchmark performance.

Practical Software Feature Set With TOS 6 of the F4-425

The F4-425 benefits from TerraMaster’s TOS 6 operating system, which provides a broad and functional software environment without requiring additional licenses or complex setup. The platform includes native tools for file sharing, snapshots, cloud synchronization, and multi device backups, allowing the NAS to act as a central data hub for several users. In a 4 bay system, these features become more relevant as storage is often shared across multiple PCs, mobile devices, and services.

TOS 6 also supports container based applications and virtualization features that, while limited by the underlying hardware, can still be useful for light workloads such as small services or test environments. The software is not as polished as some higher profile NAS platforms, but it offers a level of depth that covers most common use cases and reduces the need to rely on third party tools for everyday management.

Flexible Platform for Turnkey or DIY NAS Use with the F4-425

An often overlooked advantage of the F4-425 is how accommodating it is for users who may want to move beyond the included operating system in the future. While it is sold and marketed as a complete turnkey NAS with TOS 6, the underlying x86 architecture allows relatively straightforward installation of alternative NAS operating systems such as TrueNAS, Unraid, or other Linux based platforms. TerraMaster does not restrict this process at the firmware level, and using third party software does not invalidate the hardware warranty. In a 4 bay system, this flexibility can extend the useful lifespan of the device, particularly for users whose storage needs or technical confidence evolve over time. The presence of HDMI output and KVM support simplifies local setup when experimenting with other operating systems, even if that HDMI port is not fully utilized by TOS itself. This dual role as both a turnkey appliance and a potential DIY platform adds practical long term value for more technically inclined users.

Single 2.5GbE Network Port Limits Throughput of the F4-425

A clear limitation of the F4-425 is its networking configuration, which consists of a single 2.5GbE port with no additional LAN interfaces or internal upgrade options. In a 4 bay NAS, this can quickly become a bottleneck once multiple drives are active, particularly in RAID configurations that are capable of delivering higher aggregate read and write performance than the network interface can carry. Even with mechanical hard drives, it is possible to saturate a 2.5GbE connection under sequential workloads, and this leaves little headroom for multiple users or concurrent tasks.

The lack of link aggregation, 5GbE, or 10GbE options also limits the system’s suitability for users with faster network infrastructure or plans to upgrade in the future. While USB based network adapters can be added, this introduces extra cost and complexity, and it does not fully compensate for the absence of native multi port or higher speed networking in a 4 bay chassis.

Lack of NVMe Expansion Limits Internal Performance in the F4-425

The absence of any M.2 NVMe slots on the F4-425 places a clear ceiling on its internal performance and storage flexibility. In a 4 bay Intel based NAS released into the 2025 to 2026 market, NVMe support is commonly expected, either for SSD caching or for high speed storage pools that can absorb bursts of activity and improve responsiveness under mixed workloads. Without NVMe, all storage activity is constrained to SATA drives, which limits the benefits of the x86 platform when running applications, containers, or multiple background services. This is particularly relevant in scenarios where the system is handling indexing, backups, and media access at the same time. While TerraMaster offers other models in its lineup with extensive NVMe support, the omission here means the F4-425 cannot be easily optimized for latency sensitive tasks, regardless of how much memory is added or how the drives are configured.

Aging CPU Platform for a New Generation NAS of the F4-425

The F4-425 relies on the Intel Celeron N5095, a processor that has been widely used across multiple NAS generations and is now showing its age in the context of newer Intel platforms. While it remains capable of handling file services, media transcoding, and light application workloads, it lacks the efficiency and performance improvements found in more recent Intel N series processors. In a 4 bay system, this matters because the hardware is more likely to be tasked with simultaneous operations such as multi user access, background maintenance, and application services. The N5095 can manage these workloads, but it does so with less headroom than newer alternatives, which can impact long term relevance. As software platforms continue to add features and increase baseline requirements, the CPU choice places a practical limit on how far the system can scale over time.

HDMI Output With No Practical Software Use on the F4-425

The inclusion of an HDMI port on the F4-425 may appear useful on paper, but in practice it offers limited functionality within TerraMaster’s software environment. The HDMI output is primarily used for basic system information and troubleshooting during boot, rather than providing a usable local interface or media output experience. There is no native desktop mode, multimedia interface, or direct playback environment available through TOS that would allow the NAS to function as a locally controlled media device. In a 4 bay system with an Intel CPU capable of hardware video decoding, this unused output can feel like missed potential, especially when other NAS vendors and newer platforms have begun to implement functional HDMI driven interfaces. While the port can be helpful when installing third party operating systems, its role within the default configuration remains minimal.

Overlap With Better Equipped Models in the Same Lineup of the F4-425

A practical concern with the F4-425 is how closely it sits to other TerraMaster models that offer substantially more capability for a relatively modest increase in cost. Within the same product family, there are options that add faster networking, NVMe expansion, additional LAN ports, or more modern Intel processors, sometimes at a price difference that may be difficult to justify ignoring. For buyers who already anticipate growing storage needs, higher throughput, or heavier application use, the F4-425 can feel constrained when compared directly against these alternatives. This internal competition weakens its long term value proposition, as users may find that spending slightly more upfront would avoid the limitations around bandwidth and expansion that cannot be addressed later through upgrades.

Conclusion and Verdict of the F4-425 Review – Should You Buy?

The TerraMaster F4-425 is best understood as a deliberately constrained Intel based NAS that prioritizes affordability and simplicity over expandability and peak performance. It delivers competent multi user storage, media streaming, and general NAS functionality in a 4 bay format, supported by a software platform that covers most common requirements without forcing reliance on third party tools. Its strengths lie in predictable behavior, flexible RAID options, and openness to alternative operating systems, rather than cutting edge hardware features. For users with clearly defined needs who value an x86 platform but do not expect to push high bandwidth workflows or advanced storage tiers, the F4-425 can meet expectations without unnecessary complexity. At the same time, its limitations are structural rather than temporary. The single 2.5GbE port, absence of NVMe expansion, and older CPU architecture set firm boundaries on future growth. These constraints become more apparent when viewed alongside other models in TerraMaster’s own lineup that address these gaps at a higher but not disproportionate cost. As a result, the F4-425 makes the most sense for buyers who want a straightforward Intel NAS for shared storage and media use today, and who are comfortable accepting that it is not designed to scale significantly beyond that role.

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