My ipad only has 16 gb of space, and it filled up rather quickly. Now I want to download a new game (asphalt 7) but in order to do that I have to delete another game. The game I'm thinking of deleting is Batman: Arkham City lockdown. But I've really played the game for a long time and have gotten great upgrades that I don't want to lose. So my question is how can I save my progress on the game so that I can delete it and re-install it later and have all the upgrades I had before I deleted it?