Samba 2.0/2.1 client is an addon for MiXplorer file explorer v6.27.2+.
Download MiX from XDA store:
https://labs.xda-developers.com/store/app/com.mixplorer

You don't need this addon if you have installed MiX Silver.

If you want to disable samba 2.0 set 'smb1=true' in the advanced properties of the bookmark.

If there is any issue please send me an email at [email protected].