I have a 64gb because I don't like erasing games that I've downloaded
plus games, yeah, i'll eventually delete them after I finish them, but the games I purchase, I like to keep them
just because
so yes, its needed..its the same reason why I took out my 160gb HDD in my ps3 and swapped it out for a 500
my vita came with a 8gb card, I couldn't have squat on it
so I bought a 32gb figuring, go big or go home
that thing filled up pretty quick
then doug told me where I could find a 64gb and I bought one the same day, couldn't be happier
still have plenty of room on the thing