Well some days ago I removed my sd card and used a card reader to transfer files to my computer. Since then the musics stored in my sd card stopped showing up in the play music. I tried other music players as well but the results are the same. It nly shows up when I move the files in my device storage. How can I get the musics back in play music??? I'm using a samsung galaxy core 2, which runs android 4.4 Kitkat.