Here's a crappy video for those that don't have a GW or can't get in the beta. The video would have been up sooner if I realized you press select to browse your games, it also would have been a lot shorter if I was patient enough to wait 5 seconds longer for Pokemon Y. After the 4 minute mark I recommend fast fowarding through most of it Some things to take from this though. 1. 128GB works with no formats necessary 2. Nand saving works 3. previous save files still work.