The Western Digital Purple 4TB WD43PURZ Hard Drive is a reliable internal desktop drive designed for use with PCs. With a storage capacity of 4TB, this SATA III interface hard drive is perfect for storing a large amount of data and files. Its purple color and compact 3.5-inch form factor make it a stylish and space-saving addition to any computer setup. With a cache size of 256MB, this Western Digital Purple hard drive offers fast access times and efficient data transfer rates.