Summary: Computers crash. Software does crazy things. You can survive that, but can you survive the loss of your data? You can if you plan.
The previous module showed you how to make a backup file. It suggested that you always keep an electronic copy in a safe place, preferably on another continent.
The acid test? A tsunami hits your field location and sweeps your house and your laptop out to sea. Fortunately, you were out of the way at the time. (No kidding; it happened to a friend of mine in pre-Wordcorr days.)
Eventually you get another computer, another house, ... From there, the steps are
Your collection is restored to Wordcorr in a few minutes.