Toshiba 2 Pack 320 GB Portable Hard Drives Capacity: 320GB each. Interface: USB 2.0 Transfer Rate: Up to 480 Mb/s. Speed: 5,400 RPM. Average Seek Time: 12ms Cache Buffer: 8MB Size: 3.2"W x .65"H x 5"D Color: Carbon Gray & Flame Red. Weight: 6 oz.