Featuring a 3.5" form factor and an internal enclosure, the Western Digital Caviar green Hard Drive is suitable for both Mac and PC operating systems. It comes with a massive 3000 GB memory capacity, providing ample storage space for important user data, heavy files, music, games, movies and much more. You can connect this device through SAS/USB 2.0/SATA III interface. With a buffer size of 65536 KB and spindle speed of 5400 RPM, this 3 TB Caviar green model renders a seamless performance throughout. The Western Digital hard drive measures 1.03-inch height, 4-inch width and 5.79-inch depth, and weighs 1.61 lb.