Imation Apollo HDD. Hard drive capacity: 350 GB, Hard drive speed: 5400 RPM, Hard drive interface: USB 2.0. Weight: 160g. Bundled software: Software Total Media Backup.. Data transfer rate (max): 480 Mbit/s, Compatible operating systems: Windows 2000/XP/Vista. , Dimensions (WxDxH): 127.4 x 80.9 x 17.2 mm