The 4TB Desktop Performance 7200 rpm SATA III 3.5" Internal HDD Retail Kit from WD features a SATA III 6 Gb/s interface along with a large 4TB storage capacity giving you fast access to a large amount of data. This WD drive is designed for demanding environments where enhanced performance is crucial such as photo and video editing and gaming. With a dual processor and dynamic cache you can rest assured this drive will be there when you need it.