Originally Posted by GatorB

No you don't need a memory card so save games, but say you are taking your game and going to a friend's house who also has a 360. Wouldn't be easier to take a memory card than your 360 harddrive? The 360 memory cards are 64 MB and I would assume you fit several game saves on it. For $15 I can get a 1 GB SD card to use for a PS3. So that would be 16 times the game saves for 1/3 the cost.