Things You'll Need
Instructions
Turn on your PlayStation 3 console, but do not insert a game into the disc drive.
Press the PlayStation symbol button in the center of your PS3 controller.
Use the joystick to navigate to the "Game" menu.
Highlight the old game demo you want to remove and press the triangle button on the controller.
Choose "Delete" from the list of options and then press the X button. Press X again to confirm your decision.
Go back to the "Game" menu and expand the "Game Data Utility" folder.
Highlight one of the games for which you want to shrink data and then press the triangle button.
Choose "Delete" from the list of options and then press the X button. Press X again to confirm your decision and remove the game's installation files.