To clear the system cache
Press the Guide button on your controller, go to Settings, then select System Settings.
Select storage area.
Highlight, but do not select a storage device, then press Y on the controller to display Device Options.
Note: regardless of the storage device selection, clears the cache for all storage devices.
In the Device Options screen, select Free System Cache.
When asked to confirm the maintenance of the storage device, select Yes.
Note: After clearing the system cache, it will return to storage devices. You can then press the Guide button on the controller and return to the Home of the Xbox.