The following is the suggested way to Backup your course in Moodle.
It is good practice, at the end of a term, to also create an archive of your course for your own records.
Start on the course page that you want to backup
In the Actions menu (gear icon) block
Click on the Backup item
The Initial Settings page will load
Leave all the settings in their default
Scroll to the bottom of the page
Click the Jump to final step button
Wait a moment for the backup process to complete
Once it is finished, you will be taken to the Complete screen
From the Complete screen (above), click on Continue
You will be taken to the Import a backup file page
Click on the Download link for the course you just backed up
When the following dialogue appears, choose Save File
Click OK
NOTE: if you are not asked where to save the file your web browser has likely saved it to your Downloads folder
Finally, decide where you want to store the file. You will save the archive on your local computer or storage device, the “L” drive, or your department drive
Click Save
That’s it. You have created and saved an archive of your course.