Equipped with FireWire 800/400 and USB 2.0 interfaces, and formatted for Macintosh, this high speed portable hard drive is perfect for Mac users on the go. Use it to pack up your office files and take them home, carry thousands of songs or pictures and back up your Macintosh laptop using Apple Time Machine. Save and access data at top speeds with the high-performance FireWire 800 interface. Also includes FireWire 400 and USB 2.0 interfaces for maximum flexibility. Illuminated Capacity Gauge allows you to connect My Passport to your computer and see at a glance how much space is available on your drive.