C2G 6ft USB 2.0 One Mini-b Male to Two A Male Y-Cable – Mini Type B Male USB – Type A Male USB – 6ft – Black
When a standard USB cable cannot transfer enough power to operate an external device, such as a portable 2.5in hard drive, you need a USB 2.0 y-cable. Simply plug this cable’s USB Mini-b end into the device, and then plug the two USB A ends into open USB ports on one PC or Mac. This cable then pulls power from both USB ports, and thus increases the output to the external drive.

C2g 28107