Interesting, were you able to sync to MediaPlayer, via Airmore then?
I had no trouble sync'ing to MediaPlayer when I got my 6P, using USB (I have about 18GB of music, a lot to push anyway), but I've struggled to get a (Bluetooth mostly) app that does a sync to MP now, for updates (and photos and other files, ideally).
Maybe I'll try the AirMore app, heck, I've tried about 8-10 others, all with varying degrees of non-success, or maybe what might be called "slight but very hampered success".
GSDer, yeah, I don't want to dump all my music, it'd take a bit to upload, and I'd have to upgrade my Google account, at least as far as I know it's only 15GB free?
I already have another online backup service, and I sort of alternate between Google Drive and OneDrive for my photos (so shoot me, I'm an old Win Phone guy, still adapting), and similar. Trying to avoid paying for yet another "chunk" of cloud storage...