Help backing up Samba server files

I have a Samba server on a computer. I would like to backup the Samba files on a different computer that is a client in the Samba server network. I can easily drag and drop the Samba files onto the client. I would like to automate this process, and accomplish this using an update copy versus a copy full. How can I accomplish this as bash script? I had no luck using the ‘cp’ command. Thank you in advance.

Look at the man page for smbclient. It contains a builtin tar archiver.