You have an office that designs corporate logos. You have been working on a draft for a large client. Just as you are going to press the <save> button, the screen goes blank. The hard disk is…

You have an office that designs corporate logos. You have been working on a draft for a large client. Just as you are going to press the <save> button, the screen goes blank. The hard disk is damaged and cannot be repaired. You find an early version of the design in your mail folder and you reproduce the draft for the customer. What is such a measure called?