I’m using the F-Stop gallery since a few days now and it’s great. The SMB/CIFS support seems to be implemented already and that’s perfect when you’re in your home network. I’m also working with a NAS.
Though you can make Samba availbe to the outside world (e.g. VPN) it’s not the best protocol for that purpose I think (e.g. security).

Therefor I’d like to suggest SFTP also as a cloud protocol for F-Stop gallery. Also OwnCloud would be nice!

Thanks and greets,