by Peter Halverson.
This type of backup won't allow you to restore a specific course.
What it does do is get you back in business if a disaster happens and your moodle database or files are corrupted. It gets you back to the conditions that existed when the backup was created.
If you really wanted to restore just a specific course, you could restore everything from this type of backup and then export or re-backup the specific course you wanted. But that's a convoluted way to go. I wouldn't recommend it.