Equipped with both FireWire 400 and USB 2.0 interfaces, and formatted for Mac, the 320GB My Passport Studio 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 Mac laptop using Apple Time Machine. The flexible dual interface incorporates FireWire 400 for Mac computers and a USB 2.0 connection for convenience and compatibility among multiple computers. For further convenience, My Passport Studio is formatted HFS+ Journaled for Mac compatibility (it can be easily reformatted for Windows).