The Western Digital EIDE Hard Drive 320GB 7200 RPM Model WD2500JBRTL is a high-performance internal desktop drive designed for use with PCs and Macs. With a sleek black color and a 3.5-inch form factor, this hard drive offers fast data transfer speeds at 7200 RPM and a storage capacity of 320GB. Featuring cool running technology, data lifeguard capabilities, and ultra-quiet operation, this Western Digital Caviar drive is a reliable choice for expanding storage capacity in your computer system