You should only buy what you need. If you want to do a full backup or put music/videos on it, shou should buy it. But if it's barely using any of the 4GB, just keep this one. Or don't. It's just my silly opinion :)

dipends if you store your games on usb or sd witch u prob dont.. eitherway 32gb sd should be the bare minimum so yea

u got a point there so i think i WOULD get it, only if i have to get more games, since i can only hold about 5