A system for the storage, organisation and retrieval of files is provided by the software. A file in this system is called a download (and by the way, we don't use the noun 'download' to refer to other things in this software).
Note that the download system is not intended for placing articles: there is a dedicated news/articles system for this. You may of course use it to store articles if you prefer to, or to place articles in special formats such as PDF.