G-Technology G-DRIVE Professional External Hard Drive 2TB (Gen5, USB 3.0/FireWire 800) (0G02529) Can store up to 150 hours of DV digital video, 425 4.7GB DVD video discs, or 500,000 MP3 files USB 3.0, or FireWire-800 (or 400 via cable) Fan-less cooling system for near-silent operation Connects to FireWire-400 systems using included adapter cable Compatible with Mac and Windows systems / Compatible with OS X Time Machine