Different players can have different save files.
ORK's save game system has 2 ways to save (both can be used together or on their own). The player can select a save file to write to each time when saving, or you can have the player select an auto save slot when starting a new game and continue saving into that slot.
Auto save slot doesn't mean that it'll save automatically - the player can still choose when to save, e.g. via a save point, but you can also save the game via the event system.