I can create dropbox accounts for everyone in my family and set them up on all their various devices, and manage all those accounts. I can have a linux box run

I can create dropbox accounts for everyone in my family and set them up on all their various devices, and manage all those accounts. I can have a linux box running and connected to all those dropbox accounts giving us local physical backups of all that dropbox stuff. I don't see how I can easily do that with apple or google. Maybe there are other newer services that can do that, but I don't want to take the time to figure it all out.