Sustain business file services with a rack-mount NAS designed for uptime, expansion, and straightforward administration. The Buffalo TeraStation 51220RHNAS delivers 16 TB of installed capacity in a 2U chassis with 12 total drive bays, giving you a practical starting point for departmental storage, backup targets, and shared project data. Four 4 TB enterprise HDDs are installed, while eight bays remain open for future capacity growth without replacing the system. Built around 10GbE connectivity, this platform is suited to environments where file access speed matters and bottlenecks are not acceptable. RAID support and iSCSI compatibility provide the storage flexibility expected in infrastructure teams that need to balance performance, availability, and recovery planning. The partially populated design also helps control initial spend while preserving a clear upgrade path. For organizations comparing NAS options, this model stands out by pairing enterprise drive hardware with room to scale inside a compact 2U footprint. It is a better fit than entry-level appliances when the workload demands more than basic file sharing: centralized storage, predictable expansion, and a chassis that can grow with the environment.