Ok, so I've been trying to get my Sky3ds+ to work and it seems the problem is that it does not support 64GB cards.
I tried a SanDisk Ultra 64GB, no go. Tried a SanDisk Ultra Plus 64GB, no go. Tried a regular 32GB SanDisk, it worked.
What's up with that? I used to use the SanDisk Ultra 64 on the...