i have the same problem 2 times
solutions:
-repair sd in pc with chkdsk
-check the cias in another 3ds
-change directory of cias
-use fbi latest update or best
-delete the game corrupted or last cia installed (i install a jpn game) rf cryptofixed fs 100% legal ;)
-use another sd or format the sd...
It's not the movies or games downloads that I would worry about, like breaking into networks, downloading encrypted things, spying on network traffic. I have seen so many "Top Secret" seals on files when I was a kid
I was obsessed with finding UFOs, a surprising amount of US files where stashed on computers in other countries, China back in the early 90s omg sooo much