"If files are important to you, keep a backup, outside of cloud, or in another vendors cloud." Agreed. Broadly speaking, I don't think of my music collection

"If files are important to you, keep a backup, outside of cloud, or in another vendors cloud." Agreed. Broadly speaking, I don't think of my music collection as critical data ... and yet, when I examine the time, care and energy I have expended ripping CDs, naming and cataloging these files they are probably the single largest data input job I have ever taken part in. So with that in mind I do, indeed, treat it as critical data and have it properly backed up. "If files are important to you ..." There is this UI element in itunes / apple music where you can choose what to arrange music by: https://ipodiphoneitunestutorials.com/iTunesTutorials/i/img80.jpg https://ipodiphoneitunestutorials.com/iTunesTutorials/i/img8... ... and note that "filename" is not in that huge, comprehensive list. That tells you everything you need to know.