Hi
For security reasons SMB1 should not be longer used; although this is being ignored by several companies and users.
Top 5 reasons:
-Smb1 is not safe ( easily hackable)
-Smb1 is not modern or efficient (read, write, cache )
-Smb1 is no longer required unless you do use Windows XP / 2003 ( really bad if you are )
-Smb1 removal is not hard to do
-Smb1 is not installed on Windows10 falls creators and Windows Server 1709 and later
Wrapping it all up;
To disable smb1 from your server just use PowerShell and write the following command:
Set-SmbServerConfiguration -EnableSMB1Protocol $false