This is related to the question mentioned here:
According to both that answer and to Apple's own support, this should be possible. Basically I want to add music from "Apple Music" to playlists, so I can easily find it again. I often listen to their selected playlists and want to save the best songs from there, on my own lists.
However - the checkbox option mentioned in the above, is greyed out for me. I cannot deselect it. So if I try and add music; I get a message that I must enable iCloud Storage before I can add the music to my library.
Any ideas as to why this option is disabled?