Backup your files with a push of a button or set up the software to perform convenient automatic backups. With 7200 RPM and 16 MB cache buffer, you get fast drive performance, seamless data exchange, and instant access to your files. Simple setup, just connect the USB 2.0 cable, and your Maxtor OneTouch 4 hard drive automatically appears on your desktop. For all those precious pictures, videos, music and data files, external hard drive is a must have. Up to 480Mb/sec Bus Transfer Rate with USB 2.0 Operating system - Windows XP Home or Higher, Mac OS X (10.4.7 or later), 256MB RAM Approximate Unit Dimensions - 2.5 X 5.88 X 6.75 Approximate Unit Weight - 2.2lbs