If you already have a hardware-modded console (RGH/JTAG), USB software becomes incredibly useful. If you have a stock console, the USB software is limited to "save game exploits."
Even if you get the software working on a modded console, consider these risks:
Assuming your console is already modded with a hardware chip, here is how you use the free USB software: Xbox 360 Jailbreak Usb Software Download Free
What you need:
Step 1: Format the USB On your PC, right-click the USB drive > Format > File System: FAT32. (Note: FAT32 does not support single files over 4GB, but Xbox games are split or stored as folders). If you already have a hardware-modded console (RGH/JTAG),
Step 2: Download the Payload
Download XeXMenu.rar (approx 50MB). Extract the contents. You will see a folder named C0DE9999 or XeXMenu.
Step 3: Copy to USB Drag that folder onto the root of your USB stick. Step 1: Format the USB On your PC,
Step 4: Plug into Xbox Insert the USB into your modded Xbox 360. Turn it on.
Step 5: Launch the Software Go to "My Games" -> Scroll to the bottom. You will see a new icon called "XeXMenu." Launch it. If you see a green file browser screen, you have successfully run jailbreak software from a USB.
Step 6: Install Aurora
Download the Aurora .zip file. Extract the Aurora folder to your USB. Insert the USB. Use XeXMenu to copy the Aurora folder to Hdd1:\Apps\. Run default.xex from within Aurora.