I solved it just reading and reading and reading. Thanks very much SirDice for your information.
Finally, I added two lines to my smb4.conf
max protocol = SMB2
ntlm auth = yes
With these two lines I am telling the Samba Server to use the Samba version 2 and forcing the server to use NTLMv2 authentication. (More info at https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html).
So, finally I have all the 1TB-disk directories of my Samba Server on my Raspberry Pi running FreeBSD 12 yuhuuuuuu!
Finally, I added two lines to my smb4.conf
max protocol = SMB2
ntlm auth = yes
With these two lines I am telling the Samba Server to use the Samba version 2 and forcing the server to use NTLMv2 authentication. (More info at https://www.samba.org/samba/docs/current/man-html/smb.conf.5.html).
So, finally I have all the 1TB-disk directories of my Samba Server on my Raspberry Pi running FreeBSD 12 yuhuuuuuu!