Ok so I have a friend who has a 2DS and he was reporting the same errors you guys were. I handled him out a couple of tips I picked up from reading from just about
everywhere. Here's what I told him to do.
- Format to exFAT using the 'Default Allocated Size' option in Windows Format.
- Copy 1 ROM at a time, if possible, extract directly to the root of the mSD card.
- Don't fill your mSD, leave some big headroom. You won't be playing more than 10+ games on a 64GB card, will you?
- If you have to take a game out for whatever reason, cut/paste it to somewhere on your desktop and delete it there.
Note: I forgot to ask him what his mSD was. Sorry.
There's an optional step by using Defraggler (made by those guys who made CCleaner) but from my experiences they cause more fragmentation errors than wipe them out, for some
weird reason.
My friend reported back happy that his games are all working now with no more crappy bugs or whatever.
Take notice that these tips are
completely not fundamented and it could all be the devils work for all I know. I just read this from various places (bits by bits) and told him to do these things. It's working
now so I'll suppose these steps
fixed it.
Cheers mates!