I have my save game on Zelda ocarina of time 3d if i put gateway save exploit on there will it overwrite my save game or. Can i move my save game to the third slot in the game will it still be overwritten?

Backup the cards save using the gateway menu after you install the modded save you can use your original save with your gateway card.

No backing upthe save does not remove it from the source if you want you can make 3 backups and name them Zelda1/2/3 if it makes you feel any safer.ok is there a chance of my save file being corrupted during the backup?
ok thanks i was worry about my save file being corrupted since i play Zelda ocarina of time 3d alot and don't want to lose any of my work in the game.No backing upthe save does not remove it from the source if you want you can make 3 backups and name them Zelda1/2/3 if it makes you feel any safer.