Question about decrypting save data files
Total noob here, I'm trying to decrypt sav files from an old not-CFWd 3DS, of which I have the full folder Nintendo 3ds and even the movable.sed file, but I can't understand how to do things.
Many say that "you can decrypt files with ninfs", but I can't get the gist of it: I mounted the SD card on ninfs, and all the files were the same as before, so (from my understanding") they aren't decrypted I guess.
What am I missing?
Also, when I decrypted them, how should I proceed?
Should I just put them in the respective folder on a 3DS, or do something else with them? I'm sorry for asking something that has so many threads about it, but I can't seem to get started.