Hi,
you are able to create group folders as subfolders of other group folders.
For example, you could create a group folder named “Group folders” and then a subfolder named “Group 1” like this:
Create group folder “Group folders”
Create group folder “Group folders/Group 1” -> name needs to contain the name of the top folder and the slash “/”.
As for permissions, I recommend not allowing any write, share or delete permissions on the top level folder by removing the checkmarks once the groups have been added. Then you can allow access to the sub folders as needed…
Hope that answers your question.
Best,
Christian