So, this is an issue you've probably heard before. I have a playlist full of local files on my Mac and I'm unable to play some of them -- not all, only some -- on my phone, and they're all greyed out. Before you tell me to try uninstalling and reinstalling Spotify, or tell me to allow access through a firewall, I've done all these things. Just can someone tell me where to find the corrupted file in the com.spotify.music folder, pretty sure the problem is somewhere in there. I had this problem before, then everything started syncing again for about a month, and now it's back to this. Don't ignore this, thanks.