LaCie Y USB 3.0 Micro B to 2x A Male Cable for Rugged Mini, 2'

The "Y power-sharing" cable provides additional power to your drive from your computer, while continuing to use your drive's USB connection for data exchange and transfer. It lets you get the fastest transfer speeds out of your USB 3.0 connection, but can also be used with USB 2.0 (but will be limited to USB 2.0 speeds).