The Western Digital Purple 4TB internal hard drive is a reliable and high-performance storage solution for PCs. Featuring a rotation speed of 5400 RPM and a storage capacity of 4TB, this 3.5-inch drive is perfect for storing large amounts of data and files. With a SATA III interface and a cache size of 256 MB, this drive offers fast data transfer speeds and efficient data management. Compatible with HDD drive types, this Western Digital Purple hard drive is a dependable choice for expanding storage capabilities in your desktop system.