Situation: We use DB Business with our design team. Clients share us briefs, images, materials etc, sometimes changing the files inside shared folder, like adding or replacing images etc. At the moment, we have the solution for sharing only to e-mail which is linked through personal account to business. Thats why all shared files and folders are put into personal folder. When you need to organise shared file or folder you can't. You need premission for moving.
The possibility is to ask admin premissions (which allows you to delete files etc from clients account ect.), make a copy but this won't keep the file or folder update, when client makes changes.
The ide could be to set up an extra e-mail or let's say user for business account as well, like an main admin, who manages all the users under it. That would let the personl users to see the files, but not delete or organise them, but the main admin could organise shared stuff under certain project (folder) and keep the system going.