Unless you live under the proverbial rock, you've joined the digital age. You know how to write and save your newest literary masterpiece to your laptop and thumb drive. You even have a backup copy saved to the cloud.
You also know how to turn all those wonderful words into an ebook and send them off to Amazon and Smashwords. Your ebook can be read by everyone on Kindles, Nooks, and ereaders everywhere.
So, after all this work why am I telling to you to keep a hard (paper) copy of all your writing? It's a little thing called an Electromagnetic Pulse (EMP) attack (re: a nuclear attack). An EMP would destroy your digital data: kaput. All that work gone. But, with a paper copy no problem.
Interested in learning more?
Go to Why You Should Keep Hard Copies of Your Writings - GalleyCat .