Perfect for on-the-go laptop users. G-DRIVE mobile USB is stylish, thin, aluminum portable storage that combines USB 3.0 high-performance with Time Machine-ready backup. Easy to set up, with storage capacities to 1TB using 5400 RPM drives, you'll find it perfect for storing your most important documents, music, digital video and photo files. The G-DRIVE mobile USB is bus powered so when you're out and about you don't need to add an external AC power supply to your laptop case.