Synology RS2821RP+

The RS2821RP+ is a 3U, 16-bay rackmount NAS built for small business and remote-office deployments that need cost-effective file management with the reliability of dual redundant power supplies. It scales to 28 bays with an expansion unit and supports 10/25GbE upgrades. Unlike the +/RP+ pairs elsewhere in the range there is no single-PSU variant — redundant power is standard. Networking is entirely via the PCIe slot, so a 10GbE or 25GbE card must be budgeted for if the four onboard gigabit ports are not sufficient.