Offline Music Deleted

[Aethermachine]

Using a Samsung Galaxy s7 edge. About half of my music was deleted from spotify, it was strange because the albums had half the songs downloaded, the other half deleted. I followed troubleshooting and restarted my phone. After that 100% of my albums were gone but my settings still reported that 11 gigs were being used on my SD card. What gives? This is the third time my albums have been deleted.