Thank youBecause many of you still have trouble, here is a little guide how to format your (>64GB) microSD cards to FAT32 for the SKY3DS+.
1. Download and install EaseUS Partition Master Free
2. Delete all partitions on your Micro SD card so you only have "Unallocated space"
3. Create partition (Create as: Primary, File system: FAT32)
4. Format partition (Cluster size 64 KB)
5. Set Active
6. Hit Apply to format your card!
DONE! This card is now properly formatted for use with the SKY3DS+
this was an extremely helpful post because after trying different formatters and methods ( with no success) i simply followed these exact instructions and now my 64 gb and higher cards work on my sky3ds+
No more rainbow colors