I have tried now for several days getting my S4 to sync to SD card. My phone suddenly told me that my 64GB SD card was broken and that i needed to format it. After accepting this, i was prompted that the card was empty and needed formatting. When i then formatted it again i was prompted that the card was empty and needed formatting. Again and again and again. I removed it, inserted it into a computer and formatted it there, reinserted it in the phone and it worked fine.

in the process, obviously, my spotify sync was gone. 

Spotify now wil not save to the SD card. I have tried formatting, deleting cache, completely uninstall and reinstall spotify time and time again with no luck and now i have over doubled my included data for the month because spotify is being stupid. 

Anyone got any tips?