amzn.toHN2ncD The GoFlex ultra-portable drive makes it easy to store, back up and encrypt all your files with its plug-and-play USB 3.0 connectivity, but this is no ordinary external drive. As the core of the GoFlex Storage System, the GoFlex ultra-portable drive is the world's most upgradable external drive allowing it to deliver a truly customizable experience. Use the included USB 3.0 Adapter or upgrade to FireWire 800 or eSATA by pairing the drive with the appropriate GoFlex upgrade cable.