Playlists and songs disappearing!! Why??

Has anyone tried placing all your single playlist files in a separate folder? Anywhere internally.

Try it. Worked for me!

Can this work for Google Play Music playlists? Do you know where the playlists are stored for GPM? My songs keep disappearing from the playlists after my phone reboots. It's annoying.
 
I also experienced it with my playlist, whenever my phone is off the songs on the playlist disappeared (fyi I always turn my phone off when charging it). I found an easy solution from an Indonesian forum. Go to setting - apps - choose the 'all' tab, then find the music player you like to fix ie. GPM. After you find it choose clear data. It works for me.
 
I transferred my Itunes music onto my S7 but every time i play a song, halfway through it is corrupted. It sounds like when you play a CD and it is scratched or something. It is not the Mp3 because it plays fine on my laptop. I'm wondering if it is the phone or SD card?
 
If the SD card is the issue, why is that pics, and all the music is still recognized? Its only the songs on the playlists. The songs still remain in the main library.