Things You'll Need
Instructions
Remove the hard drive from the top of your old Xbox 360 system. To remove the hard drive, push the bottom of the console and gently pull the hard drive away from the system.
Connect the transfer cable to the port on the bottom of your old hard drive where it hooked into your system.
Plug the other end of the transfer cable into any of the USB ports on your Xbox 360 Slim system. These are located on the front of the console.
Turn on the Xbox 360 Slim. It will prompt you to make sure you have the newest console software installed.
Select "Yes, transfer to console" from the message box.
Select "Start" to begin the content transfer. This can take several hours depending on how much content is being transferred.