DESC: The Western Digital WDMT3200TN 320GB My Passport Studio Portable Hard Drive, with dual interfaces, is Formatted for Macintosh, features a clever capacity gauge, and comes with a soft drawstring bag. Use this portable drive to back up your office files and take them home, carry thousands of songs or pictures and back up your laptop. The included FireWire 800 interface is perfect for Mac Computers and a USB 2.0 connection for convenience and compatibility among multiple computers.