Some CD32 games has a save game option included, while others relies on the password system. To see the current save games that are available, you'll have to push either the blue or red button while the CD32 is idle (just after you've turned it on). There you'll see a list. These saves can be locked and unlocked. If you unlock them, they will be available for overwriting. If you lock them, changes are big that you can't save any other games, due to limited storage capacity.