Xk3y Reloaded (XKR) is the new smaller version of xkey which effectively replaces the old x360key R7.2 (aka v1.1). The motherboard connects to the SATA bus inside the Xbox 360, and sits between the drive and the Xbox 360 motherboard. Xkey is a full-fledged computer system running embedded Linux. It is capable of many things such as: Emulating the Xbox 360 DVD drive. Reading USB hard drives and other USB media with various file systems. Updating itself and other hardware from USB media. And a lot more!