The problem is that my SD is not enough big for emuNAND, so i wan't to do something else while waiting for my new SD card.What's the problem ?

There's always the exploits with the browser you could do, like injecting Pokemon via QR code or injecting GBC/NES ROMs into your virtual console games. I'm sure there are other things you could do with the browser, but these are just from the top of my head.The problem is that my SD is not enough big for emuNAND, so i wan't to do something else while waiting for my new SD card.