Have followed @TechnoDadLife video to set up Piwigo, I used portainer but the same information appears in OMV's docker.
Everything seems to work as expected and no errors appeared during the setup, in Piwigo I set the bind /pictures to a folder on my mergerfs mount /Photos image below;
I tried a few picture uploads as per the video, this works fine and so does viewing the images -> but where are they stored? the share I created /Photos is empty and using WinSCP and Cloud Commander running a search for one of the picture names finds nothing.
I have set this up for the wife as she has so many photos stored everywhere I thought this would be a great central storage/viewing platform and with a backup as well hopefully I won't lose any