I have the same problem, can't write to the 1st directory of nfs share in GUI.
Searched a day until found this thread here.
Coming from 14.04 to 16.04 and nemo 3.6.5 instead of nautilus (mint cinnamon 17.3->18.3). The same problem also consists with thunar.
So it should be a common bug.
Maybe a follow failure from another (gnome?)package, because with a fresh usb stick (in my case mint 18.03) it works!
I have the same problem, can't write to the 1st directory of nfs share in GUI.
Searched a day until found this thread here.
Coming from 14.04 to 16.04 and nemo 3.6.5 instead of nautilus (mint cinnamon 17.3->18.3). The same problem also consists with thunar.
So it should be a common bug.
Maybe a follow failure from another (gnome?)package, because with a fresh usb stick (in my case mint 18.03) it works!