Ty for your reply! Found a solution a couple of minutes ago. In OMV, NFS the shared folder is available by "/export/ address. So I just typed "/export/" for the Remote directiry - and here we go! Now it's updating lol.
It worked for Samba too - typing the NAS name in the Remote directiry is not need - just the shared folder.
Ty all so much! Cheers! Vodka to everyone (well, I'm Russian after all)