That update was withdrawn, and users who had updated were advised to contact Microsoft immediately for help recovering any lost files. It should not currently be a problem for anyone unless somehow you are still running update version 1809 instead of 1803. Still, there is no substitute for backups and no excuse for not doing them if you depend on the hard to replace data on your machine(s). I use Acronis (and have ever since I was tasked with evaluating image backup products by my previous employer). I use a two-layered automatic backup process: Monthy images to an external hard drive with weekly incremental backups, and a weekly backup to their cloud. I can restore individual files, or the whole shebang whenever I need to (I also keep current bootable USB restore drives that I update every 6 months or so so that I can boot minimal windows with Acronis restore from that to restore the rest. If you aren't doing something similar, you consider what you will do when your hard drive ultimately fails...