Instructions
Turn on your Xbox 360 and log in with your gamertag.
Press the guide button, located in the middle of your Xbox 360 controller, and navigate to the "Settings" tab. Select "System Settings" and press the "A" button on the controller to open the system settings menu.
Navigate to the "Storage" menu option and press "A" on the controller.
Navigate to the option labeled "Cloud Saved Games" and press the "Y" button on the remote. Select "Disable" to turn off cloud storage.
Press the "B" button to return to the "Storage Devices" menu. Highlight the hard drive and press the "A" button on your remote.
Select "System Items" and press the "A" button on the remote; then select "Cloud Storage Console Copy." Select the "Delete" option and then return to the Xbox 360 dashboard by pressing the guide button.