Disabling the Sync Library on your iPhone or iPad will indeed remove all Apple Music content and downloads from your device’s music library. This means that any songs or albums you have added to your library from Apple Music will no longer be available for offline listening or streaming.
When you turn off iCloud Music Library, your device will no longer be in sync with your iCloud Music Library, which is where your Apple Music content is stored. This can be useful if you want to free up storage space on your device or if you prefer to only have locally downloaded music.
It’s important to note that disabling Sync Library will not delete the actual music files from your iCloud Music Library or from any other devices that are still syncing with it. The music will still be accessible through other devices that have iCloud Music Library enabled.
However, if you want to completely remove the Apple Music content from your device, including the music files themselves, you can go to the Music app and manually delete the songs and albums that were added from Apple Music. This will ensure that the music is completely removed from your device’s storage.
To summarize, disabling Sync Library will remove all Apple Music content and downloads from your iPhone or iPad’s music library, but it will not delete the actual music files from your iCloud Music Library or other synced devices. If you want to remove the music files completely, you will need to manually delete them from your device.