Synology DiskStation DS925+ Review

The DS925+ is the kind of NAS most small offices and serious home users end up shortlisting: four bays, dual 2.5GbE, a pair of M.2 NVMe slots that can serve as cache or as a full storage pool, and Synology's DSM software suite, which remains the most polished NAS operating system you can buy. Add the DX525 expansion unit and the platform scales well past what most households or small teams will ever fill.

Context matters enormously here, though. This model launched under Synology's 2025 drive compatibility policy, which steered buyers toward Synology-branded disks. That policy was reversed in October 2025, and with DSM 7.3 installed, mainstream drives such as WD Red Plus and Seagate IronWolf work fully again. If you were holding off on the DS925+ for that reason alone, the objection is gone — and the value calculation changes substantially, because drive choice is often the larger share of the total build cost.

Who is it for? Power users running Docker containers and virtual machines, small teams wanting an all-in-one file, backup and surveillance appliance (up to 40 IP cameras), and anyone who values software maturity over raw hardware specs. Who is it not for? Anyone whose main workload is Plex transcoding, and anyone who has already outgrown gigabit-class networking.

As a standalone product, the DS925+ is genuinely good. The AMD Ryzen R1700 is a sensible fit for containers and light virtualisation, RAM expandability has improved over the DS923+, and the tool-less drive installation plus a generous accessory bundle (power adapter, two network cables, bay locking tools, SSD mounting screws) makes setup painless. Synology's quoted sequential figures of up to 522 MB/s read and 565 MB/s write are comfortably beyond what a single 2.5GbE link can carry, which is exactly why the networking situation stings.

That is the central problem. Losing the PCIe slot that allowed a 10GbE upgrade on the predecessor turns what should have been a straightforward generational bump into a trade-off. You get two 2.5GbE ports and no path beyond them — fine for most, a hard stop for anyone doing video work or multi-client editing over the network. Reviewers are near-unanimous that this is a step back, and I agree; it caps the useful lifespan of an otherwise durable piece of hardware.

At $639.99 before drives, the DS925+ is asking a premium that is justified mainly by DSM and the surrounding app ecosystem rather than by the hardware. That is a defensible pitch — the software really is that good — but it leaves the box vulnerable to anyone willing to trade polish for expandability. Note too that reporting on the release date is inconsistent (April versus June 2025), so treat "how long has this been on shelves" claims with a little caution.

Buy it if you want a dependable, well-supported four-bay NAS and 2.5GbE is enough for you. Think twice if you own a DS923+ with a 10GbE card in it, because this is not an upgrade in that scenario.