Factory data reset would fix your issues. And your media files are stored in the folder DCIM on your SD card..Down below are the steps...hope it helps!
Factory Data Reset is a tool used to remove everything that was imported, added or installed on the device.
WARNING: When using this feature; everything is deleted. Nothing stored on the MicroSD will be affected.
Important Note: Your contact and email information is automatically backed up to the Gmail server. Your information will be restored when you login with your user name and a password.
To Perform a Reset
Touch Factory data reset
Touch Reset Phone
Touch Erase Everything
I had to call Verizon techincal support a couple times to try ti fix it. They said to convert all the music into mp3 format and to reformat the SD card in my phone. I did both and it worked for a couple days until it started again...... I called Verizon and they said to exchange my phone so I did. The new phone froze once, but I've had it less then a day :/