Owner of a shared file/folder on creative cloud cannot be change. However you can save the file on your local machine by selecting save as option and that way you will be the owner of that new Save file.
Thanks but that doesn't give me a way to do it at the folder level and I can't tell the client to save 3500 files to her local machine.
I'm a graphics guy and am just setting up file storage for a large commercial entity. If I'm the only one who can delete files and folders from the archive then when I die, no one can delete files and folders from the archive for the rest of eternity?