So recently I ran into a problem with my 3ds that literally drove me to system format my 3ds.
before I reformatted my 3ds I turned off the power and removed my old SD card.
I know it deletes all the system files except for the E store account and that i'm able to redownload my games.
My question is, will I be able to use my old save data and Mii plaza on my old SD card? or will I have to start everything over fresh.