Add a 2.5-inch (9.5 mm height) Serial (SATA) hard drive to this aluminum USB2.0 enclosure to make a completely self contained portable hard drive. Buss powered -- fully tested with all Apple Laptops that have USB(OS 9 and OS X). It even does Windows. External power or drivers may be needed on non-Apple systems. Includes USB cable, and a protective pouch. Item is new, and comes with 90-day warranty.