Hi, I enabled iCloud Music library in iTunes. The match process started and eventually marked 99% of my local songs as "removed" from iCloud. I have no idea why. It appears that the only songs that were successfully matched were those previously purchased from iTunes. As a test I selected a song and chose "Add to iCloud Music Library". This appeared to upload the song to iCloud (i.e, the physical file), and it successfully appeared on my iOS device. This however is not a solution. I've disabled/re-enabled iCloud Music Library, with no change in results. For what it's worth, 98% of my local library is definitely available in Apple Music. Any thoughts? P.S. If it matters, I did pay for iTunes Match for a year, but that was a long time ago, and I haven't used it since. Update: I noticed - by chance - an album missing from my local library. I checked Time Machine and confirmed that the album was there before I enabled iCloud Music Library. To be safe I'm restoring my entire library (I have no idea what other albums could have been deleted). For now, I am keeping iCloud Music Library disabled.