...
0. In case of installation on Windows 10 machine that will communicate to Linux Samba share: check if you can login to the destination backup folder using with Samba credentials using File Explorer. In some cases Windows OS cannot see Samba share if it is running outdated protocol and in some other cases that not yet explored enough (displayed error: "Windows cannot access \\IP_ADDRESS. Check the spelling of the name... etc.)". Solution: Run command prompt with administrator rights and execute two following commands. Then reboot and try again.
...