Circles 0.16.1 / NC 15 how to add files?

I got to the point where I have two test (local) circles set up and “mastered” basic user management.

Now, I see no way to share anything within the circle – I started obviously with files, but there is no option in any share menu that I could use to share a folder or file within particular circle.

What am I missing?

In the share field. Instead of writing a username write the name of the circle and it will pop up there