Stories about authors who lose stories - or even whole novels - because their computer dies still crop up from time to time. It's the nightmare scenario. Writing something once is hard enough. Writing it again, from scratch, doesn't bear thinking about.
So, this is a gentle reminder to ensure you have a reliable backup regime in place. There are lots of ways to do it these days. Do all your writing online in something like Google Docs. Save your files to a Dropbox folder. Use one of the many online backup services. But do something.
The key, in my view, is to set up an automatic system. If you rely on manually copying files to another drive, or emailing files to yourself, sooner or later you'll forget. And then when you really need that backup it won't be there.
So, if you're not covered, sort something out today. Set up an automatic system and it can work away without you having to worry about it. One day you'll be glad you did...