Did you ever want to make a game where people can insert an SD card, or a memory card and save the game on that card so they can take there saved files everywhere? Kinda like PS1 / PS2 style, and Game Cube. They had little cards that stored the saved data of games.
Well, now you can!
Have an option inside your game, say Options - Save Data - Select location to save (Save games to computer, Save games to Memory Card) and if Save games to Memory Card is selected, another menu is opened saying "please select your drive letter", and they type there drive letter in, (Usually USB sticks are drive letter K and I) also give hints how to find the letter if they dont know how to
Then when saving the game have it save to that directory 
