I have tried through normal NFS, FTP and can not get my media share drive to connect to latest OSMC no matter what I do. I have super old Kodi on a SD and it connects just fine to the drive.
Any ideas why it wouldn’t see this drive. NFS Browsing does not even open on OSMC
That router might only support SMBv1 so you might try going to settings>services>SMB client> and set min and max version to that. If it does support higher versions then v1 might be disabled for security reasons which also disables browsing. In this case you have to manually put in your share (ie smb://admin:password@readyshare/foldername/)
If you have working in Kodi 15 you should actually be able to just copy .kodi/userdata/sources.xml and if your have it .kodi/userdata/passwords.xml and put them into the same place in the new install and it should work.