Changing Xbox 360 background is simple, heck it will take just few clicks. You need to perform following steps to replace your favorite console’s background as you desire.
Note. You can choose images of resolution 1440×810, 1680×1050, 1280×720, 1920×1080.
Copy your desired image in USB storage device.
Now plug-in the USB device into your Xbox 360.
After signing in to your account, navigate to My Xbox >picture library>Portable Device.
Select a picture and accept it, Your background will be replaced with the image you just selected.
Simple, isn’t it ?