Can I limit the amount of storage shared per family member?
I don't want my kids to use all of my paid storage. Can I restrict the amount of space each family member can use? If not, this feature should be added.
There is currently no option to limit storage used by a family member when sharing iCloud storage.
This is primarily a user-to-user support forum; other Apple users like you. You may want to make the suggestion to Apple via Feedback - iCloud - Apple