The Seagate Exos X16 is a 12TB internal desktop hard drive with a 7200 RPM rotation speed and a 256MB cache. It is compatible with both PC and Mac and has a SATA III and SATA I interface. The drive is designed for enterprise use and has a 2-year manufacturer warranty. The form factor is 3.5 inches and the storage format is HDD only. The unit is a single unit and is black in color.