I have a Samsung F-700 and it has no problem reading and utilizing files on the current micro sd. At first when I'd insert the 16g card it would not even load. After formatting I finally got the files on the 16g to show but when I try to, for example, play a song or video it claims the files either "Do not exist" or are incorrect format. I've tried testing the 16gb on other computers and phones and it seemed to work just fine. Any help or suggestions are appreciated.