Well, i know there´s no way yet to get a higher memory above 64gb, but i was wondering about the Game cartrige storage. Well, each game is a kind of a memory card with the game files encriptated, right? If the people trying to figure how to use a cheaper memory stick try to go the other way and make a game card with a slot to micro sd. It´s not for vita backups of course, but this space could storage homebrew and emulator roms, once the vita games install dir cant be changed. Then you can put all your roms in one place and use the memory stick to vita backups. Well, is only a concept. I know it´s more complicated than this to make this possible, if can be done.