Features:The hard drive disk is the best option for media enthusiasts who game on Xbox 360.Expand your Xbox360 Slim experience with downloaded content and greatly shorten game loading time.Save your game progress， X Live gamer profile， game demos， and custom soundtracks， etc.Reduces the noise of disk reading and lowers down the temperature of the machine in operation.Helps you to download and save movies， television programs， videos and more.Kindly remind: Because the drive stored some system files， the available space would be about 13.9G.To format the hard drive， please format it with your Xbox 360 slim instead of the computer. Otherwise， the system files in the hard drive will be formated.Specifications:Compatibility: For XBOX 360 Slim ONLYCapacity: 20GBColor: BlackItem size: 10.5 * 7.5 * 2cm / 4.1 * 3.0 * 0.8inItem weight: 132g / 4.65ozPackage size: 12 * 9 * 3cm / 4.7 * 3.5 * 1.2inPackage weight: 158g / 5.6ozPackage List:1 * 20GB Hard Drive for Xbox 360 Slim