This is very odd.....

So I bought my Vita today(thank you college refunds) and I bought Ultimate Marvel vs. Capcom 3 with it. But I didn't have enough for a memory card(Gonna buy one tomorrow) and when I got to the title screen the game asked me if I wanted to create saved data and I meant to select no since I have no memory card for it but I accidently selected yes and the game created saved data for me. I double-check by exiting the game and re-entering again and my saved data was still there. Next I tried downloading the Vita Software update and it worked. It installed into the system and everything. So in my mind I was thinking "Hellz Yeah". Next I tried downloading Netflix off the PSstore onto my Vita but I couldn't do it because the system told me that I need a memory card. Now my question is how the hell am I able to save my UMvC3 data and download the update patch for it and also download the new system software but I can't download things off the PSstore?

Although, not every game has room for saves in its own card. For example, Uncharted still needs a memory card to save. But, other than that it's pretty much like the above poster said.