Additional security groups

[Lynne Newbitt]

Does anyone know if its possible to make additional security groups for use in an Office365 Group?

The 3 standard groups are OK but I want to have specific permissions on a folder and I want to break inheritance.  It would be easier to have an additional group to put users into but cannot see a way to make one.

I know in SharePoint its possible.

[#2]

Technically is possible, but not recomendable to change default security configuration in a modern SPO site....the reason is just by design: Microsoft is "trying to hide" security configuration in modern team sites...but as I said, you can do it

[#3]

@Juan Carlos González Martín is right but you still can. which will leave you as a administrator with 2 dashboards to arrange the security one for groups and one for SharePoint