Comment by king_geedorah

Spotify has (had? I no longer use it) a feature that would allow you to make local media available as part of your library anywhere so long as your machine was on and connected to the internet. I would imagine that feature requires disk access under these sandbox / permission models.

Edit: I should say, the model it was created with (select a folder, all media in that folder is mirrored) requires such permissions. One could imagine designs that don’t.