Subfolder restriction

Hello,

I need to create multiple folder, one folder per group of user. I created token which make a folder withe the name group. All these folders are in the groups folder, so we are the structure like this:
root/groups/group-1
root/groups/group-2

The problem is that I can't restrict access of subfolder group-1 or group-2, when i restrict access content groups folder, the descendant are restrict too, and if i allowed groups, group-1 can switch to group-2.

I use th group module for drupal 8 to make some group of user.

Thanks to you