Synology DiskStation DS225+ Review (2026): Easy 2-Bay NAS

If you want one place to keep your files, back up every computer in the house and run a few light apps, a NAS is the obvious answer. This synology diskstation ds225+ review looks at a 2-bay model aimed at people setting up their first one: home users and small offices who value software polish and low noise over raw hardware muscle.

This review is based on Synology's manufacturer specifications and on what independent expert reviews report, not on hands-on testing by us.

What the DS225+ is

The DS225+ is a two-bay network-attached storage unit. You fit two drives, connect it to your router and use it as a private file server, backup target and small app host. Its main selling point is Synology's DSM operating system, which turns the hardware into a managed platform with file sharing, syncing, backup and camera tools in one interface.

It uses an Intel Celeron J4125 four-core processor, running at 2.0 GHz base and 2.7 GHz turbo, with 2 GB of DDR4 non-ECC memory installed. It sits in the mid-range part of the market. Across three published expert reviews it averages 7.4/10: Dong Knows Tech gives it 8.3/10, How-To Geek 7/10 and NAS Compares 6.8/10. The scores range from 6.8/10 to 8.3/10.

Design and build

The DS225+ is a compact desktop unit, measuring 165 mm × 108 mm × 232.2 mm, and the spec sheet lists a weight of 1.3 kg. That is small enough to sit on a shelf or desk without taking over the room. Its two bays take 3.5-inch SATA hard drives or 2.5-inch SATA SSDs, and both are hot swappable. If one drive fails, you can replace it without powering the system down.

Synology also lists a 3-year hardware warranty. For a device meant to hold family photos, documents and backups for years, that is reassuring.

The physical connections are modest but sensible: one 2.5GbE RJ-45 port, one 1GbE RJ-45 port and two USB 3.2 Gen 1 ports. There is one SODIMM memory slot, which is how the RAM can be raised. The spec sheet lists no M.2 NVMe slots.

Features and what they mean day to day

DSM and Synology Drive

Reviewers consistently praise DSM as polished and beginner-friendly. In practice, setup and day-to-day management happen through a browser-based desktop-style interface instead of command lines or obscure menus. Synology Drive provides private cloud storage and file syncing, so you can keep your files on your own hardware rather than relying on a third-party cloud service.

Backup with Active Backup Suite

Backup is where a NAS like this earns its place. Active Backup Suite protects PCs, Macs, Linux machines, virtual machines and cloud accounts. A household with a mix of Windows and Mac computers can back them all up to one device. A small office can do the same for staff machines and cloud accounts without paying for a separate backup product for each one.

Btrfs, snapshots and ransomware protection

The DS225+ supports the Btrfs file system (as well as ext4 for internal drives), and Btrfs enables snapshots. Synology also provides immutable snapshot protection, which is aimed at ransomware. If malicious software encrypts your files, an immutable snapshot is a point you can roll back to, because it cannot be altered or deleted in the meantime. Reviewers single this out as a strength, and for anyone storing irreplaceable files it is a more practical feature than a faster processor.

Surveillance Station

Surveillance Station manages IP cameras, and two licenses are included. If you only need a couple of cameras, you can build a small recording setup without buying extra licenses. Larger camera setups are not what this model is pitched at, and Synology's own spec sheet is the place to check camera-count limits.

RAID options

The supported options are Synology Hybrid RAID, Basic, JBOD, RAID 0 and RAID 1. With two bays, RAID 1 mirrors your data across both drives so that one drive failure doesn't lose it. Synology Hybrid RAID is a flexible option aimed at people who may change drive sizes later. A mirror is not a backup on its own, so use the Active Backup tools or an external copy for important data.

On capacity, the US product page lists a maximum raw capacity of 40 TB using 20 TB drives.

Performance, noise and power

Network speed

The 2.5GbE port is the headline hardware upgrade for many buyers. Reviewers note that it delivers faster file transfers than gigabit-only 2-bay NAS units. Synology lists sequential throughput of 282/217 MB/s read/write. To benefit, you need a 2.5GbE-capable computer or switch, since a plain gigabit connection will cap what you see. The second port is 1GbE. There is only one 2.5GbE port, and there is no 10GbE upgrade path, so this is as fast as the networking gets.

Processor and memory

This is where the criticism concentrates. The Celeron J4125 is described by reviewers as dated, and a common criticism is weak transcoding for Plex. If your plan is to stream video that needs converting on the fly to several devices, this is not the NAS for it. Playing files directly is a different matter, but anyone who cares about transcoding should read the reviews carefully before buying.

Memory is the other limit. The 2 GB installed is modest, though it can go up to 6 GB (2 GB + 4 GB) via the SODIMM slot. That helps if you plan to run more apps or services at once, but it is a ceiling, not a stepping stone to something much bigger.

Noise and power

This is a strength. Synology lists a noise level of 19.6 dB(A), and reviewers describe it as quiet. Fan modes and HDD hibernation are available, which matters for a box likely to sit in a living room, study or home office. Power consumption is listed at 16.98 watts during access and 6.08 watts in HDD hibernation, so running it around the clock is not a heavy burden.

What experts like and what they criticise

The praise is consistent. Reviewers like the 2.5GbE port, the beginner-friendly DSM software with Synology Drive and Active Backup, the low noise and low power draw, the snapshot protection against ransomware, and the practical extras: two hot-swappable bays, a 3-year warranty and the included Surveillance Station licenses.

The criticism is just as consistent and shouldn't be waved away:

• The CPU is described as dated, with weak Plex transcoding.
• Only 2 GB of RAM is included, with 6 GB as the maximum.
• There are no M.2 NVMe slots, so no SSD caching, and no expansion option.
• There is a single 2.5GbE port and no 10GbE route.

Scores run from 8.3/10 at Dong Knows Tech to 6.8/10 at NAS Compares. The software and everyday behaviour are strong, but the hardware is where the criticism concentrates.

Who should buy the DS225+

This NAS makes the most sense if you:

• are new to NAS and want something that is easy to set up and manage;
• need central file sharing and backups for several computers, including Macs, PCs and Linux machines;
• want a private cloud with Synology Drive instead of a subscription storage service;
• care about low noise and low power use because the unit will be in a shared space;
• want a couple of IP cameras managed without extra license costs.

Who should skip it

Look elsewhere if you:

• plan to run Plex with heavy transcoding;
• want SSD caching, since there are no M.2 NVMe slots;
• need room to grow, as there is no expansion option and only two bays;
• want 10GbE networking, as that is not available here;
• expect to run many demanding apps and containers at once on limited RAM.

How it fits in its category

In general terms, 2-bay NAS units trade capacity and expansion for simplicity and price. The DS225+ leans heavily towards simplicity and software quality. Its appeal is DSM, the backup tools, the quiet running and the ransomware protection, rather than a standout processor. Treat it as a reliable file-and-backup box with some light extras, not a small media server or a platform you can keep upgrading.

Verdict: a sensible first NAS if you accept the limits

The DS225+ is not exciting hardware, and its experts say as much. What it does offer is a quiet, efficient, well-supported 2-bay NAS with software that makes file sharing and backup approachable. With a 7.4/10 average from three expert reviews, it is a solid choice for home users and small offices whose priorities are storing and protecting data. If your plans involve Plex transcoding, SSD caching or faster-than-2.5GbE networking, you will hit its limits quickly, and it is worth looking at other options before you commit.

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