The WD Red Pro 14TB NAS HDD is designed for demanding NAS and business storage environments requiring high-capacity, always-on performance. Featuring a 14TB capacity, SATA III interface, 7200RPM spindle speed and 512MB cache, it delivers reliable performance for backups, file sharing and multi-user workloads. With transfer speeds of up to 255MB/s, a 550TB workload rating and a 2,000,000-hour MTBF, the WD Red Pro is built for intensive NAS applications and 24/7 operation. Backed by a 5-year warranty, it is an ideal storage solution for professional and enterprise NAS systems.