Modern Xbox 360 Modding: The "Bad Update" USB Jailbreak Guide
BadBuilder: A tool to help prepare the USB files, often found on GitHub.
Step 4: Plug into Xbox Insert the USB into your modded Xbox 360. Turn it on.
Homebrew & Emulators: Run custom apps and retro console emulators.
How to Jailbreak Xbox 360 with USB Software Download Free
The Legacy of X360 Jailbreak