Buffalo technologys ministation thunderbolt portable hdd is portable thunderbolt with an usb 30 dual interface external drive solution the thunderbolt 10 gbps interface is twice as fast than usb 30 while preserving backward compatibility with existing devices that support usb 20 or usb 30 bus powered the ministation thunderbolt portable hdd requires no additional power supply and is easy to carry just plug the portable hdd body with the included thunderbolt cable onto your mac enc