Please make it possible for any given file or folder to be managed by multiple users. For example, a particular folder containing files relevant to a specific business partner might have several people authorized to manage or update files within that folder, and other people who can only read or download them. This is a critical feature to make this tool more viable for what I would consider to be a highly common file sharing scenario. File sharing is not always one-to-one, nor is it always only a single file, but often a group of files.
