I really do advise anyone reading this to use the SaveGame gem. It scales incredibly well and it’s so nice being able to simply add the vars you want saved to the serialize/deserialize methods of the actors you want saving.
I have a very large open world map where players can build huge bases made up of hundreds of actors (possibly thousands, i haven’t actually tested how many). I do auto-saves every 2 mins and it isn’t even noticeable to the player when it occurs.
I think a lot of thought went into the gem, so unless it really doesn’t suite your needs, i feel it should be the ‘goto’ for devs implementing a save game feature in their projects. But that’s just my opinion.