The Dell/WD DC HC520 12TB HUH721212AL5200 0F29535 is a high-performance SAS 12Gb/s 3.5" HDD designed for use in cloud storage, servers, and data centers. With a rotation speed of 7200 RPM and a storage capacity of 12TB, this internal desktop drive offers fast read speeds of up to 255MB/s and a transfer rate of 12Gb/s. Built by Dell as part of their Ultrastar product line, this silver HDD also features a cache size of 256MB and is designed for reliability in demanding storage environments. Perfect for businesses and individuals looking for a high-capacity, high-speed storage solution.