Making a manual backup of a course in Moodle will depend on your account permissions in that course.
If you are an editing teacher of a course, you are able to:
If you are a course creator on the Moodle site, you are able to:
Make a backup of any of the courses that you have access to, selecting which content and additional plugin configurations to include.
Download the backup file of the course in its
.mbzformat, allowing you to archive it elsewhere, so that it can be restored for later use.