Looking around for a translation of the "Check Disk for NDS" program included in Sakura, I found a similar program called "MCtool" (version 0.16). When I ran this on my m3ds real (the file was prepatched for m3 sd, but m3real autopatches), I pressed A to sort my stuff alphabetically. It said something to the effect of "sorting" for about five minutes, then made awful buzzing and popping noises. When I tried to reboot my DS, my card alerted me that it could not find the system files. I plugged my card into my computer, and all of my folders but one had become locked, formatless/extensionless files equal in size. Strangely, my NDS folder was missing and an iconless file named "." exists, but it disappears if clicked on, reappearing when the folder is next entered. The amount of total data on my microsd hasn't changed, so I am desperately hoping for a way to retrieve my lost data. Has anyone experienced this problem or know of any possible solutions?