Synology DS225+ NAS Review
Synology DS225+ NAS Review – Should You Buy?
The Synology DS225+ is a 2-bay desktop NAS released in 2025 as a refresh to the DS224+, aimed at home users, remote workers, and small teams needing centralized storage, backup, and multimedia functionality. It retains the Intel Celeron J4125 processor, a quad-core chip with integrated graphics, and includes 2GB of DDR4 non-ECC memory soldered to the board, with an available slot to expand the total to 6GB. Connectivity consists of both a standard 1GbE port and a 2.5GbE port, along with dual USB 3.2 Gen 1 ports for external drives or UPS devices. The chassis is compact and passively efficient, consuming less than 17 watts under load and producing under 20 dB(A) of idle noise—well-suited for environments where silence and energy efficiency matter.
The DS225+ runs DSM 7.2, Synology’s proprietary NAS operating system, and supports the full catalog of Synology applications for backup, file sharing, collaboration, and even light virtualization. Users can take advantage of tools like Active Backup, Hyper Backup, Surveillance Station, Synology Drive, and Virtual Machine Manager, with support for Btrfs and SHR offering additional flexibility. While the DS225+ delivers a solid turnkey experience for typical NAS users, its dated CPU, limited upgrade path, and increasingly restrictive drive compatibility policy raise questions about long-term value and competitiveness in the current NAS landscape. This review will examine five key advantages that justify its place in the market—and five potential drawbacks that could sway buyers toward alternatives or delay a purchase.
6.8
DSM 7.2 Software Suite: Includes license-free tools like Active Backup, Snapshot Replication, Synology Drive, Photos, and Surveillance Station.
Low Power Consumption: Consumes just ~17W under load and ~6W in hibernation, making it highly efficient for 24/7 use.
Quiet Operation: Runs at just 19.6 dB(A) in idle, with a single 92mm fan and well-controlled thermals, ideal for home or office environments.
Integrated Graphics Support: The Intel J4125 includes UHD 600 graphics for light Plex or Jellyfin transcoding and improved multimedia indexing.
2.5GbE + 1GbE Ports: Offers faster-than-Gigabit networking without requiring premium models or PCIe upgrades.
Flexible RAID and File System Support: Supports Btrfs, SHR, RAID 0/1, and volume expansion with larger drives via DSM.
Compact and Lightweight Design: Small footprint (165 × 108 × 232 mm, 1.3 kg) fits neatly into tight or silent workspaces.
Strict Drive Compatibility: Officially supports only Synology-branded HDDs and SSDs, with DSM limiting or blocking unsupported drives.
Outdated CPU: Still uses a 2019-era Intel Celeron J4125, which lacks the performance headroom of newer N-series or AMD chips.
Memory Constraints: Comes with 2GB soldered RAM and supports only up to 6GB with Synology-validated modules.
No I/O Expandability: Lacks PCIe, SD card, or USB 3.2 Gen 2 ports; USB limited to 5Gbps with no front-mounted convenience port.
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Feature-Rich DSM Software and Integrated Services
One of the strongest arguments in favor of the DS225+ is its inclusion of Synology’s DiskStation Manager (DSM), widely recognized as one of the most polished NAS operating systems on the market. DSM 7.2 runs natively on the DS225+ and includes a comprehensive suite of first-party tools designed for file management, backup, synchronization, collaboration, and multimedia.
Applications such as Active Backup for Business enable full system imaging and granular backups for Windows and Linux clients, while Hyper Backup supports encrypted, versioned backups to remote Synology NAS, USB drives, or public cloud platforms. These tools are license-free and integrate tightly with DSM’s centralized control panel and task scheduler, making them practical for individuals and small teams alike.
The DS225+ also supports Snapshot Replication, allowing users to create fast, low-overhead restore points across shared folders or entire volumes. This is especially useful for protecting data against accidental deletion or ransomware threats. Multimedia services such as Synology Photos and Video Station are included, with support for AI-driven features like facial and object recognition—provided the RAM is upgraded to at least 4GB.
Additionally, users can deploy lightweight productivity services such as Synology Drive, Chat, and Office, all of which are accessible via browser or mobile apps. While the DS225+ is limited to 2 bays, it still benefits from full access to Synology’s software stack, giving users enterprise-grade functionality in a compact and relatively affordable unit.
Locked Drive Compatibility Limits Flexibility and Upgrade Options
A major drawback of the DS225+ is Synology’s increasingly rigid stance on drive compatibility, particularly with its 2025 product generation. At launch, the DS225+ only officially supports Synology-branded HDDs and SSDs, including the HAT5300 and SAT5200 series. While these drives offer solid performance and enterprise-grade validation, they are often more expensive than third-party alternatives and far less widely available in retail markets.
More critically, DSM may block or degrade functionality if users install unsupported drives—such as WD Red, Seagate IronWolf, or Toshiba N300—even if those drives meet technical requirements. This includes disabling RAID creation, expansion, and in some cases even volume initialization.
For users hoping to reuse drives from older systems or build cost-effective arrays with commodity drives, this presents a serious limitation. The policy effectively turns the DS225+ into a semi-proprietary system where basic RAID features and DSM warnings depend on purchasing Synology-approved hardware.
While it’s possible the compatibility list may expand in the future, as of July 2025, this restriction creates significant friction for DIY users or small offices managing mixed storage fleets. It also undermines the flexibility that has traditionally been one of Synology’s key advantages over more locked-down storage ecosystems. Users seeking the freedom to choose drives based on price, warranty, or local availability will find the DS225+ ecosystem increasingly restrictive.
Exceptionally Low Power Consumption and Quiet Operation
The DS225+ is particularly well-suited for 24/7 deployment in environments where power efficiency and noise are concerns, such as home offices, media rooms, or shared living spaces. In real-world usage, the system consumes just 16.98 watts during access and drops as low as 6.08 watts in HDD hibernation, making it one of the most energy-efficient 2-bay NAS systems in its class.
This low draw is aided by the efficient Intel J4125 processor and a single 92mm system fan that manages thermals without overcompensating. During testing, the DS225+ maintained component temperatures of 32°C–37°C even under sustained moderate CPU and disk activity, confirming that the chassis design and airflow are well-optimized for the thermal envelope.
In terms of acoustics, the DS225+ is also ideal for quiet setups. It produces just 19.6 dB(A) of noise at idle—barely above ambient background levels—and remains quiet even under drive access or medium fan profiles. This makes it an appealing choice for use in proximity to desks, entertainment setups, or even bedrooms, without becoming a source of distraction. The adjustable fan modes (Full-Speed, Cool, and Quiet) can be fine-tuned in DSM, allowing users to prioritize either silence or cooling based on workload and ambient conditions. For users who want a reliable NAS that can operate continuously without noticeable noise or energy penalties, the DS225+ delivers an efficient and unobtrusive experience.
Aging Intel Celeron J4125 CPU Limits Future-Proofing
The DS225+ continues to use the Intel Celeron J4125, a 4-core, 4-thread processor first launched in late 2019. While it still performs adequately for DSM tasks, light media streaming, and small office workloads, it is now well behind newer processor architectures in terms of efficiency, instruction set support, and overall responsiveness.
Competing NAS units released in 2024 and 2025 have moved on to Intel N-series, Jasper Lake, or even embedded AMD processors, many of which offer better performance-per-watt, additional cores, and support for modern instruction sets such as AVX2 and higher memory bandwidth. In contrast, the J4125’s dated 14nm Gemini Lake Refresh architecture lacks modern features and could begin to show its age sooner, especially under multitasking or when running additional DSM packages concurrently.
Although the DS225+ is not intended for heavy virtualized workloads or media encoding, the use of such an older CPU architecture restricts its growth potential. During testing, even modest activity such as Surveillance Station recording or Synology Drive sync tasks caused the CPU to reach 60–70% utilization, leaving little room for additional services. Docker and Virtual Machine Manager are supported, but their use is constrained by both CPU headroom and the device’s limited memory ceiling. For users expecting to scale their usage over the next 3–5 years, the DS225+ may struggle to keep pace as DSM continues to evolve and introduce more background services, analytics, and real-time processing demands.
Integrated Graphics for Light Transcoding and Multimedia Tasks
A notable advantage of the DS225+ is its use of the Intel Celeron J4125, a quad-core x86 processor that includes integrated Intel UHD 600 graphics. While this is not a new CPU, the presence of onboard graphics enables hardware-accelerated video decoding and transcoding, a feature that’s become less common in newer NAS systems using ARM-based or non-iGPU x86 processors. For users planning to run Plex or Jellyfin, this hardware acceleration allows the DS225+ to handle light 1080p transcoding tasks—useful when streaming to devices with limited codec support or over constrained network connections.
This capability is especially important for homes or small offices that want centralized media storage without relying on local playback compatibility. During testing, the DS225+ performed adequately when transcoding one or two 1080p streams simultaneously, especially when the source files used H.264 or H.265 formats compatible with the GPU.
Synology’s native apps like Surveillance Station and Synology Photos also benefit from integrated graphics, improving responsiveness during thumbnail generation and background indexing of photos and videos. While not intended for intensive media workflows, the DS225+ offers enough GPU performance for common multimedia use cases, making it more versatile than similarly priced NAS units that lack any form of video acceleration.
Limited Memory and Restrictive Upgrade Policy
The DS225+ ships with just 2GB of DDR4 memory, which is soldered directly to the motherboard, limiting flexibility from the outset. While it does feature a single accessible SODIMM slot to expand the total memory to 6GB (2GB onboard + 4GB additional), Synology officially supports only their own branded 4GB memory module. Using non-Synology memory will either trigger DSM warnings or void technical support eligibility. This restrictive policy contrasts with other NAS vendors that support industry-standard memory upgrades more openly. In practical terms, the 6GB ceiling is already considered low for 2025, especially as DSM continues to expand its service ecosystem and memory-hungry packages like Photos, Drive, and Surveillance Station become more prevalent.
Real-world testing shows that even at idle with no user-installed applications, DSM often consumes 28–38% of available memory due to intelligent caching. Once additional services are installed—such as indexing, media streaming, or light virtual machines—the system can begin to feel constrained, leading to slower response times or increased reliance on swap memory. For example, enabling facial recognition in Synology Photos or running simultaneous Docker containers may quickly push the system beyond its comfortable operational range. This limitation makes the DS225+ poorly suited for users who want to experiment with virtualization, host large collaborative environments, or ensure headroom for future DSM features. Even for modest multi-user environments, the soldered memory and limited upgrade capacity represent a clear technical bottleneck.
Dual LAN Ports with 2.5GbE Support for Faster Transfers
The DS225+ is equipped with two Ethernet ports—one standard 1GbE and one 2.5GbE—giving users flexibility in how they connect and scale their network performance. This is a meaningful improvement over entry-level NAS models that only offer single Gigabit connectivity, especially as more consumer routers and switches begin to support multi-gigabit speeds. When paired with a compatible switch or direct 2.5GbE connection, the DS225+ can achieve transfer speeds up to 280–290MB/s under optimal conditions, significantly reducing the time needed for backups, media streaming, or large file transfers over LAN. For those sticking to 1GbE setups, the second port still provides redundancy or the option to separate network traffic between general access and administrative tasks.
Although the DS225+ does not support link aggregation or PCIe expansion, having dual LAN ports allows for some segmentation and future-proofing in small network environments. Users can reserve the faster 2.5GbE interface for high-priority devices such as a workstation or editing PC, while the 1GbE port can be used for background syncing, IP camera feeds, or system management. The inclusion of 2.5GbE is also relevant in home lab and prosumer scenarios, where higher-speed NAS-to-NAS replication or remote backup over multi-GbE connections is becoming more common. While the benefit is conditional on the rest of the network infrastructure supporting these speeds, it’s still an advantage that many previous 2-bay NAS models from this brand do not provide.
Limited I/O Expansion and Slower USB Connectivity
While the DS225+ includes the essentials for a basic NAS setup, its external connectivity is minimal, offering just two USB 3.2 Gen 1 ports, each limited to 5Gbps. This is notably behind the current standard of USB 3.2 Gen 2, which offers 10Gbps, and well below newer competitors that feature USB-C, eSATA, or PCIe slots for future expansion.
The lack of a front-mounted USB port or SD card reader also reduces convenience for users who regularly transfer media from cameras or external drives. In scenarios involving backup rotation, media ingestion, or hot-swapping data from multiple USB devices, users may find themselves manually unplugging and swapping cables due to the low number and placement of ports.
This limitation becomes more pronounced as the DS225+ cannot be expanded via PCIe, ruling out the addition of 10GbE networking, additional NVMe cache, or external SAS enclosures. Even Synology’s own expansion units are unsupported on this model, meaning what you see is essentially what you’re locked into for the lifespan of the system. While the DS225+ works well within its default role, users requiring scalable connectivity for workflows like multi-tiered backup, external archives, or direct media workstations will likely find it too constrained. The inability to expand I/O makes it harder to adapt the device as your setup grows or changes, placing it at a disadvantage in a market where even entry-level NAS units are becoming more modular.
Compact Design with Full DSM Access and RAID Flexibility
Despite its small physical footprint, the DS225+ delivers the full functionality of Synology’s DSM ecosystem, enabling users to configure advanced storage, backup, and collaboration features without needing a larger or more expensive unit. Measuring just 165 mm x 108 mm x 232.2 mm and weighing 1.3 kg, the DS225+ fits easily on a shelf, under a desk, or alongside other AV equipment. This makes it especially appealing to users with limited space or those looking to maintain a minimal setup. The 2-bay form factor supports 3.5″ SATA HDDs or 2.5″ SSDs, and users can configure their storage using Basic, JBOD, RAID 0, RAID 1, or Synology Hybrid RAID (SHR) depending on redundancy and capacity needs.
The benefit here is that while the DS225+ lacks the expansion features of higher-end NAS units, it doesn’t compromise on software or configurability. DSM allows for volume expansion with larger drives, RAID migration from Basic to RAID 1, and SSD TRIM support for improving SSD longevity. Users can also benefit from Btrfs snapshots and file versioning, even on this compact system.
This flexibility allows individuals to start with a single drive and expand or rebuild as storage needs increase. The ability to pair this with external drives via USB 3.2 for backups or offloading archived content extends its functionality further. For users who want the core NAS experience without the complexity or physical scale of larger models, the DS225+ is a strong, space-efficient option.
Unclear Upgrade Path Amid Synology’s Strategic Shift
The DS225+ sits within a transitional period for Synology, during which the company has increasingly signaled a shift toward pre-populated, locked-down platforms such as the BeeStation and BeeStation Plus series. These newer lines are aimed at users seeking simplicity and cloud-like convenience, but they also reflect Synology’s broader move toward closed ecosystems with tighter control over hardware and software integration. As these preconfigured models begin to replace traditional bare-metal Plus series NAS options in Synology’s lineup, it’s unclear how much longer models like the DS225+ will remain actively supported or prioritized in DSM development.
This creates uncertainty for prospective buyers who want a long-term investment. While Synology’s current support lifecycle is generally strong, the tighter coupling between software and specific hardware could eventually result in DSM updates being optimized for newer, more restrictive platforms. For example, users of the DS225+ may find that future DSM features—such as enhanced AI functions or hybrid cloud integrations—are limited or unsupported due to the older CPU or reduced memory ceiling.
Additionally, if the company continues to prioritize its locked-drive strategy and proprietary accessories, even firmware-level changes could make legacy systems like the DS225+ feel increasingly boxed in. This isn’t an immediate concern, but for users thinking 3–5 years ahead, the direction of Synology’s portfolio suggests the DS225+ may not age as gracefully as its predecessors once did.
Synology DS225+ NAS Review – Verdict and Conclusion
The Synology DS225+ delivers a polished and well-integrated NAS experience that caters to home users and small teams looking for dependable data storage, backups, and light multimedia handling. Its compact form factor, efficient thermal and acoustic design, and access to the full DSM 7.2 ecosystem make it a compelling choice for those who prioritize low noise, low power use, and a robust software suite. The inclusion of 2.5GbE networking, integrated graphics for basic Plex or Jellyfin transcoding, and support for Btrfs, SHR, and snapshot replication ensure that it remains practical for a wide range of core NAS tasks. It’s a system that “just works,” and for many users, that is enough to justify its place on their shortlist.
However, the DS225+ is increasingly defined by its limitations as much as its strengths. The use of an aging processor, restricted memory expansion, limited I/O, and locked-down drive compatibility significantly reduce its appeal for users who expect flexibility, performance headroom, or long-term scalability. When positioned against similarly priced or even cheaper NAS solutions from competing brands—many of which offer newer CPUs, broader third-party drive support, and better external connectivity—the DS225+ risks feeling outdated straight out of the box. Synology’s evolving product strategy also casts doubt on the long-term direction for devices like this. For users who are already committed to the Synology ecosystem or need something simple and quiet for basic NAS duties, the DS225+ can still be a solid purchase. For those looking for open-ended expandability or stronger hardware per dollar, however, it’s worth comparing alternatives or waiting to see how Synology’s next generation unfolds.
Synology DS225+ NAS |
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Amazon in Your Region for the Synology DS225+ NAS @ $339 |
B&H for the Synology DS225+ NAS @ $339.99 |
Synology DS225+ NAS Pros | Synology DS225+ NAS Cons |
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