Course data can be copied from one Moodle course to another by using the Import function found in the gear menu. This allows you to copy all or select course resources and activities to a different course site.
Note that following these instructions will copy all course content (files, forums, etc.), but will NOT copy enrollments or any student data (forum posts, submitted assignments, etc.).
The process described below is necessary only when trying to restore a course from the Moodle Archive.