Are you going to change the card SD / Micro SD for your Nintendo 3DS / New Nintendo 3DS and use emuNAND ? You do not want to wait for the new emuNAND update? ┐ Do you want to lose the data you had in the emuNAND ? If any of the answers to these questions is "yes", this application can make your life easier . This PC program called emuNAND Tool lets you copy the emuNAND hidden from your SD / Micro SD card partition, save it in the PC as a .bin file and then return it to inject any other SD / Micro SD card to continue using the emuNAND same when we make the change of SD / Micro SD.

http://nds.scenebeta.com/noticia/emunand-tool