I wanted to share a folder on my MacBook Air running Big Sur to a MacBook running Monterey. So I used Settings -> Sharing, and then let's say, add the folder Foo to the sharing list.
Now on the Mac running Monterey, I used Network in Finder, and click on the other Mac. It showed nothing and it seemed I had to use "Connect As"... but it seems I have to connect as the user on that machine with the password, and once it is done, I can see the whole hard drive of that Mac, which is not what I want to do.
So how I can not "overly share" something?