X360key - Play All Your Xbox 360 Games Free From any USB Drive

The Xbox 360 Key is a USB loader device for the Xbox 360 consoles, it allows you to load your games from USB storage devices such as hard drives & flash drives.

X360key FAQ

If you have a stock drive
a dump must be obtained using available tools (we recommend the Maximus Lizard 360).

Firmware Dumping
At launch xKey can't dump the drive firmware. Updates, planned for shortly after release, will allow xKey to perform this task for you. There is no need to flash your drive and 0225+ owners can enjoy all the benefits of xKey without the hassle of swapping PCBs or waiting for an unlock hack

Configuring xKey - Fats
xKey requires a dump of the original firmware from your drive. This is copied to the xKey's SD card, when the xKey boots the firmware file its analysed, the drive type is identified and the drive key etc. are extracted.

Configuring xKey - Slims
xKey requires the file set (dummy.bin etc.) that can be created with available tools, these are copied to the xKey's SD card. When the xKey boots, the files are analysed, the drive type is identified and the drive key etc. are extracted.

If you have CFW
You should have a backup of the required files and they are used to configure xKey. There is no need to reflash your drive with OFW

If you have CFW
You should have a backup of the OFW (or all the information to recreate one) and it is this file that is used to configure xKey. There is no need to reflash your drive with OFW.

If you have a stock drive
a dump must be obtained using available tools (we recommend the Maximus Lizard 360).