I recently transferred about 500 songs from my Droid Razr Maxx's internal phone storage to my SD card using a laptop to transfer the music safely. The transfer was successful and all music shows up on the SD card and can be played from the file location on the phone. The problems started when I began to listen to music on my Play Music app from google. At first all songs showed up on device, however every song in the library gave an error message "unable to play song." I turned the device off and back on and everything began to work fine until I noticed half of my songs no longer showed up on on the device. I can still play the music if I select the "all music" option on Play Music. When I selected to play all music a safety pin appeared under my notifications that says "keeping requested music." This action sucked up about 2 GBs of data in a few short hours. Does anyone know how I can fix this issue? It doesn't make sense to me that I cannot store music on my SD card to be played without triggering a chain reaction of grief.