Four bays for noticeably less than the big names — capable hardware, with TOS software that’s decent but not class-leading.
Best for: Budget capacity seekers. Price: ~£400 (diskless, 4-bay).
TerraMaster’s F4-424 undercuts the big four-bay names while giving you a capable Intel platform and 2.5GbE networking.
Capacity per pound. If you need four bays on a budget as a backup target, it delivers.
TOS is functional but trails Synology’s DSM, and the community and support are smaller. A sensible budget pick if software polish isn’t your top priority.
Anyone who wants lots of bays and capacity without Synology/QNAP money.
People who value the most polished software and biggest ecosystem.