The Folder resource enables teachers to display a collection of resources (including text documents, PDF files, and multimedia) to users to either view and/or download.
To view a Folder resource, select the resource link on the front page of the course.
You see the name of the folder, a description of the folder’s contents, and the content of the folder (both subfolders and files).
More on folders on the Moodle website (may be available in English only)