Music and Videos wont work anymore NEED HELP :(

[edward ebdalin]

before i can add music and videos freely with the new SD card and it was working fine until one day some of it got duplicate of course i deleted the others i thought i keep the both files but after deleting the extra the other one wont work anymore its like they're connected and now i reformat my SD card and copy all the musics and videos from my computer to my lumia 625 like i used to do but now it wont recognize the musics and videos in my phone but i can play them in the desktop please i need help .. i already tried removing the sd card put it back again, restart the phone, sync in emails/desktop/phone etc. still can't play on my phone

lumia 625
wp 8