I'm assuming they mean, of the actual bits that have ever been downloaded, where does it come from?
There's a distinction between songs which are from playlists explicitly "available offline" and songs in Spotify's cache. Presumably the mobile version doesn't have a cache for non-downloaded songs.
Re:How Spotify Works
by bookwormAT on Saturday November 26, 2011 @07:38AM
(#3279687)
I think the Android version does have a cache beside the offline playlists. At least there is an option to set the size in settings.
That point about doesn't quite make sense. Most of the time on my phone I'm playing from the local cache in off line mode. So it all comes from the servers originally but 98% of it is repeated plays from the local cache.