I updated to 3.5.1 and also used the fixing fragmentation tool you provided. still no progress. I'm REALLY regretting updating this firmware in the first place.
UPDATE: solved it...sort of. So if I change my icon view (by pressing the icon on the upper right side of the bottom 3DS screen)...
Need some assistance if possible. I have a 64Gb exFat micro sd card for my Gateway cart. Before the update to Gateway 3.5 Ultra, I've had no problems whatsoever with running my 3DS roms. But after the update, I'm getting the fragmentation error all of a sudden. I've looked all over the net...