Having used your computer for decades, your hard disk is full of personal data. And being a careful person you have a lot of backups, probably dating back till the eighties. What if somebody got a hold of them? Say by stealing your PC. Or maybe you have confidential data on your laptop, e.g. unanonymized data of a clinical trail Or maybe you sometimes enter your credit card number to order something in your browser which saves it on disk to help you entering that form the next time you want to order something. Either way you have to protect your data. That’s why you update your software and use a password for your user account. But that does not help you if somebody was to steal your hard disk. Unless of course you have encrypted it.
