Hacking How to switch NNID?

[Cha0tic]

So I'm all set up with Luma and all that glorious stuff have been for a while on my 2DS. But at the time I had no access to my old NNID had to talk to nintendo to get it unlinked from my previous 3ds I sold off to someone and forgot to remove my account. So I made a new NNID and started using that. My question is now is there anyway switch to my old NNID without losing everything I threw on this SD card so I don't have to redownload every game I have on my 128 GB Micro sd?

 

[Quantumcat]

Make a NAND backup and SD card backup, then format your system and log in to the old NNID. If you want to get back your old stuff, make another set of backups and restore the old one.