I have had an HTC M8, M9 and now have the M10. Using the same micro SD card in the M8 and M9 I never had a problem transferring the pictures or creating new folders. Now that I have the M10 it will not let me move pictures to the SD card. No I have not formatted it as I never did with the M8 or M9 maybe the M10 has to have some type of permissions. Does anybody else have this problem?