theres too many threads that answered these questions but ill answer them anyways. 1. The psvita has 512 mb of RAM and you have a choice to buy a 4,8,16 or 32 gb memory card to put in it. 2. You can buy games from your local game store in the form of cards, not UMDs, and you will also be able to download from the playstation store. 3. Don't make threads without checking if there are 100 threads answering the same question.