This hard drive delivers reliable storage expansion and the incredible 5 Gbit/s transfer speed of USB 3.0, all in one sleek, aluminum package. The transfer speed, at 10 times faster than USB 2.0, will blow you away. The ventilated enclosure boasts exceptional heat dissipation for near-silent, fan-less operation. It is remarkably durable, offering state-of-the art shock absorption and superior all-around performance, and its stackable design gives you a streamlined, uncluttered workplace. Win XP/Vista/7 +(32 and 64), MacOS X 10.4.8 (requires formatting)