G-Technology G-DRIVE mobile 1TB Portable FireWire and USB 3.0 Drive for Time-Machine (Silver) (0G02391) High-speed USB 3.0 and FireWire-fast data transfer Bus-powered hub eliminates the need for a separate power connection Solid aluminum case, ultra-stylish profile makes for easy portability Up to 1TB storage capacity handles documents, music, digital video and photo files Time Machine-ready, pliug-and-play setup on Mac OS