drugo said:
hi
do you have problems with the micro sd formated to exfat too?
thanks man!
Yes I do. Some files stick and some vanish. I'd stick to testing for now.

Copy a few folders of .mp3 & .jpg files to SD and leave the copies on it for a few days to see if the files (and folders) stick. Also try placing a few portable apps on the SD and run them from there. Test to see if the files remain after a few reboots.

As far as I know NTFS format is best because of file permissioning issues with other formats.