https://ubuntuforums.org/showthread.php?t=2390873

 

삼바에서 윈도우 네트워크를 통해 파일을 공유하려면 samba 설정을 수정해야 함.

 

The only way out of this - at the moment - is to edit /etc/samba/smb.conf ( which by the way does not exist by default in Ubuntu any longer so you will have to install thee smbclient package first ) and change it back to the old default:

Code:
client max protocol = NT1

Put it right below the workgroup = WORKGROUP line.