How to upgrade your Nintendo 3DS SD card
EDIT 25/10/2013: I’ve updated this guide to now include SDXC cards, which need to be specially formatted before you try to migrate. Find the new guide here. With demos now available on the 3DS eShop, it’s likely your original 2GB SD card will become a bit full, if it hasn’t done already. I found myself in this position today. Thankfully, I had a spare 4GB to “upgrade” to. You can, of course, just swap your old card for your new …