Please make sure you use the latest version of TMS Cloud Pack. The demo CloudStorageDemo has a button "Create Folder" and this demonstrates how to create a folder.
resdat -> '{"error": "Full Dropbox access attempt failed because this app is not configured to have full Dropbox access. Should your access type be app folder (''sandbox'') instead?"}'
How do I switch the dropboxcomponent not to use root or sandbox but "app folder"?