[Rho1904]
        create mask = 0660
        directory mask = 0775
        force group = mm3, sambashare
        guest ok = Yes
        inherit permissions = Yes
        path = /media/mm3/Rho1904/
        read only = No
        valid users = @mm3


[RhoCube2004]
        create mask = 0660
        directory mask = 0775
        force group = mm3, sambashare
        guest ok = Yes
        hosts allow = 127.0.0.1 192.168.1.0/25 GoodHost
        inherit permissions = Yes
        path = /media/mm3/RhoCube2004/
        read only = No
        valid users = sambashare


https://wiki.samba.org/index.php/Setting_up_Samba_as_a_Standalone_Server#Creating_a_Basic_authenticated_access_smb.conf_File

https://www.digitalocean.com/community/tutorials/how-to-set-up-a-samba-share-for-a-small-organization-on-ubuntu-16-04

Different share settings
https://linustechtips.com/topic/1244758-changing-folder-permissions-for-the-future/