Buffalo  MiniStation Cobalt 320 GB USB 2.0 Slim Portable Hard Drive with TurboUSB HD-PE320U2/RD (Ruby Red) PC and Mac compatible TurboUSB data transfer rates - up to 20% Faster! Plug-n-Play - ready for immediate use Memeo AutoSync Software automatically syncs your MiniStation with your PC and Mac USB Powered - no power supply needed