Instructions
Connect the controller containing the Nintendo 64 Controller Pak to the slot labeled "1" on your console.
Press and hold the "Start" button on your controller and press the "Power" key on the Nintendo 64 console to turn it on.
Select the game save you want to delete by using the controller's directional pad.
Select "Delete" and press the "X" key on the controller to delete the game save and free up space on the Nintendo 64 Controller Pak.