The WD Black 3.5" Internal Hard Drive from WD has a SATA 6 Gb/s PC computer interface, and provides 4TB of storage. It is designed for storing large multimedia files of photos, videos, games, or applications and programs. This PC hard drive delivers high-speed transfer speeds with 7200-RPM performance, and read rates of your files with cache sizes of up to 256MB of DRAM. It can also be used for gaming to store your games downloadable content and can be combined with an SSD for dual drive configuration.