Hitachi H31000U 1 Terabyte (1TB) USB 2.0 3.5" External Hard Drive w/One-Touch Backup (Black) Hitachi H31000U 1 Terabyte USB 2.0 3.5-inch External Hard Drive General Features: Color: Black 1 Terabyte (1 TB) storage capacity USB 2.0 interface Data Transfer Rate: up to 480 Mbps 7200 RPM spindle speed 3.5-inch form factor Easy-to-use backup software pre-installed LED indicator Rear Panel Features: One (1) USB 2.0 Type B port On/Off switch DC power connector Unit Dimensions: