The HGST Ultrastar 7K4000 4TB internal desktop drive is a high-performance hard disk drive designed for use in both PC and Mac computers. With a rotation speed of 7200 RPM and a storage capacity of 4TB, this drive offers fast data access times and ample storage space for storing large files and applications. The silver-colored drive is compatible with various interfaces including SATA III, SATA II, and SATA I, making it versatile for different systems. With a cache size of 64 MB, the HGST Ultrastar 7K4000 ensures smooth and efficient data processing for demanding computing tasks.