In "Settings" -> "Texts" you can provide default text values for the copyright and description fields of folders and files. These can be overwritten in every folder as needed. Please note that the copyright and description field are inherited down the folder tree, including the file.
You can also set a text for download confirmation. If provided, each download will be preceeded with a popup asking for confirmation of said text. This is useful for ensuring information about proper rights and limitations.