So, recently I got a new SD to use with my 3DS, as my 4GB card is getting kind of full. However, when I try to copy my data from the card to my desktop, it stops transferring when it gets to about 3%. It doesn't say that it was interrupted, it just goes to 0 bytes per second. I also tried transferring using my friend's laptop and ran into the same issue, so it's definitely not the card reader.
I also tried copying the files one at a time and the DCIM folder was fine but the Nintendo 3DS folder froze. I tried transferring some of the folders in the Nintendo 3DS folder one at a time to see which one was causing the issues and it seems to be a folder labeled "extdata" and another labeled "titles."
While playing my DS I don't have many regular problems with save data or anything, but I have had issues with games crashing. I don't know if that would be related to this but hey it doesn't hurt to add it in