Hello,
I use openmediavault as file server with nfs shares.  
In my fstab I put
on my ovm-server the owner of the files/dirs is www-data:www-data.

I bring my user into the group www-data.
In the file-manager I see the mounted directory, but when I open it it is empty.
In a terminal I can dive into the directory and can see all the files. [ as user ]
Where can I search ?

Franzel