Best 5-Bay NAS UK 2026: Top Picks for Home Storage

5-bay options, honestly assessed

There is really only one credible 5-bay NAS on sale, so this table compares it against the nearest sensible alternatives if five bays is not a hard requirement.

Which should you pick

Why the shortlist is this short

Five-bay NAS units are a genuine niche. Most manufacturers skip straight from 4-bay to 6-bay or 8-bay because the internal layout and cooling design rarely justifies an odd number in between. Synology's DS1525+ exists partly because it slots into a specific gap for people who have outgrown 4 bays but do not want the cost, size, or power draw of a 6-bay rack-style unit. QNAP, Asustor and TerraMaster do not currently field a direct 5-bay equivalent in this market, which is why the picktiers table above leans on 2-bay and 4-bay alternatives for comparison rather than pretending there are more genuine 5-bay competitors than there are.

The DS1525+ itself is a sensible design if you do need the bays. The AMD Ryzen V1500B is a capable quad-core chip for a NAS in this class, though it has no hardware transcoding on current DSM, so treat it purely as a file server and virtualisation host rather than a media transcoding box. The ECC memory is the more interesting differentiator: it protects against silent memory corruption over long uptimes, which matters more as you add drives and the array grows. Dual M.2 slots let you add NVMe caching without giving up a drive bay, and dual 2.5GbE ports support link aggregation for higher aggregate throughput than a single-port 4-bay unit can offer.

Be honest with yourself about bay count