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.
Product Description
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 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 ext ...