G-DRIVE mobile with Thunderbolt – stylish portable storage for laptop users featuring ultra-fast Thunderbolt and USB 3.0 interfaces. G-Technology combines up to 1TB* capacity and a 7200RPM hard drive, together with Time Machine compatibility for quick back up of documents, music, digital video and photos. Also the G-DRIVE mobile is bus powered, and that means when you're on your way out, you don't need to add an external AC power supply to your laptop case. | *As used for storage capacity, one gigabyte (GB) = one billion bytes and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment.