Did you know that you may accidentally delete your 3DS NES game save data if you don't go about things in a proper way? It's not likely to happen to most people, but just incase, here's some rules to remember.

- do not press the home screen button to switch in-between games and then turn off the system
- this will delete your NES game save
- turn off NES games by hitting the Home button, then the X button to close the game
- this will allow you to turn off your 3DS without losing the data