Portable Thunderbolt & USB (Universal Serial Bus) 3.0 Drive G-DRIVE mobile with Thunderbolt – stylish portable storage for laptop users featuring ultra-fast Thunderbolt & USB (Universal Serial Bus) 3.0 interfaces. G-Technology combines 1TB capacity & a 7200RPM hard drive, together with Time Machine compatibility for quick backup of documents, music, digital video & photos. Also the G-DRIVE mobile with Thunderbolt is bus powered, & that means when you’re on your way out, you don’t need to add an external AC power supply to your laptop case. Quick Facts: Up to 1TB of storage Transfer Rate USB (Universal Serial Bus) 3.0 & Thunderbolt Compatible with Mac & or Windows Stylish aluminum design Bus powered, no AC adapter required All cables included 3-Year Limited Warranty