Tripp Lites U256-025 is an inexpensive way to create an external USB storage drive, ideal for laptop / notebook users. Simply insert any manufacturers PATA / IDE 2.5" hard drive ( not supplied ) into the rugged aluminum case, and plug the Included USB cable into the a computer or hub USB port ( 2 ports required for data and power). At only 4.75"L x 3.25"W x 0.5"H, the U256-025 travels easily, and includes a protective travel bag. External drives are great for storing large files like photos, music, movies, etc. Compatible with Windows 98SE / Me / 2000 / XP / Vista / Win7 or MAC OS 9.0 and above. Supports USB 2.0 data transfer rates up to 480Mbps. Key Features Lightweight, compact design ideal for portable storage Fits standard 2.5 in. IDE/PATA drives ( not supplied ) Windows and Macintosh compatible Windows 98SE/Me/2000/XP/Vista/7 or MAC OS 9.0 and above 4.75"L x 3.25"W x 0.5"H 44-pin IDE internal connection Hi-Speed USB 2.0 mini B external connection USB cable, A-type male x 2 to mini B male, 4 ft. (1.2 m) Limited Lifetime Warranty Typical Applications Ideal for Laptop / Notebook / Netbook / Desktop users as an external USB storage device System Requirements Pentium 266 MHz or higher 64 MB RAM Windows 98SE/Me/2000/XP/Vista/7 or MAC OS 9.0 and above