WesternDigital 160GB External Hard Drive (WDXU1600BBRNN) Backward compatible with existing USB 1.1 ports The fast and easy way to add instant high-speed storage for both desktop and notebook systems Hot-swap capability allows easy connection of a new peripheral without powering off the computer Designed with Western Digital&#8217;s WD Caviar 7200 RPM hard drive and a high-speed USB 2.0 bridge for maximum performance Compact and elegant design, easily stackable