Clickfree Automatic Backup 500 GB USB 2.0 Portable External Hard Drive HD525 (Pearl White) 5400 RPM, 2.5 Inch form factor, 500 GB Hard Drive Works with Windows Vista, Windows XP, Windows 2000 and Mac OS X 10.5 or later Transfer data to new computers, new Windows versions, or from PC to Mac Share Photos easily to Facebook and Myspace Backup multiple computers with one Clickfree portable backup drive!