windows 10 (October 2018 update) (version 1809) deleted all my files

"Are you quite sure your regrettable data loss has nothing to do with your own failure to ensure safe and backup on thumb drive, USB-drive, NAS, whatever?"

That's blaming the customer.  Patches shouldn't hurt.  Period.  

totally agree here.

Hindsight is always 20/20, too bad we all cant go back and have a do-over whenever we want. It doesn't help to chastise people who have lost their documents, they probably wont let it happen again. The blame falls squarely on microsoft's shoulders. sorry

It is actually EXACTLY the reason I never use OneDrive storage, even not the one I got for ‘free’ with Office 365 business. I just don’t trust anything that connected to Microsoft, time and time again they mess up things big time. The blunder of 1809 only convinced me of my choice. Don’t want to bet my business and income on their pushy cloud storage that is way too deeply integrated in Windows. How often I saw OneDrive crash, being destroyed by yet another update of the app etc. Thanks but no thanks. There grass is greener elsewhere.

even more: if Microsoft knows its OS is so instable and buggy that it requires backups of user files, it should autimatically do so before upgrading. They push everything on us users anyway, so an obligatory backup would be the least of our problems. Windows 10 became a joke, worse then malware.

It’s even worse: the consumers they managed to get using their pesky cloud storage got the middle finger too: suddenly from one day to the other the storage limit got reduced enormously. I am an Office 365 user, but do not use the 1 TB OneDrive storage (except now and then to move a small file from my mobile device to somewhere else). Why? First of all I don’t trust Microsoft, I don’t want to lose business files because of some bug somewhere. Also, I still have the sudden change of the license agreement for home users in the back of my mind. Last but not least, for me in the EULA there are way too many doubtful and limiting conditions for use. IF Microsoft decides some important file I store there doesn’t suit there rules, who gurantees me they will not delete it without asking? And what would this OneDrive sync tool - which has a proven record of being buggy - do if it gets haywire once again? Maybe then it will not delete local files but cloudfiles. I do not trust anything connected closely to as well OneDrive as well Windows. I learned my lessons the hard way in the past, many of my collegues too. Last but not least: a NAS is a lot faster, cheaper and most of them can backup to cloud storage if you really want. So why on earth store data on an unreliable Windows 10 system?

Business and enterprise customers may be moving in that direction, but I don't think the majority of Home users have any interest in Cloud file storage, as evidenced by the many opinions expressed in these forums.

As a business/enterprise customer there are files we are legally (to this point, we will see how the future catches up) not allowed to save to the cloud. As such, backups and redundancy are important, but getting the end user to always cooperate with this task is not a sure thing.

I've seen a lot (and I mean a lot) of "blame the user" responses on both the Feedback Hub and Social Media sites (Twitter, etc.) - backups are a vital part of the computing experience but so is not deleting a ton of files during a routine update.

This is a pretty prime example of why a QA team is needed. Microsoft is not a startup, offloading all of this on to the consumer is not a valid way to do business. Further, it has since come out that multiple users reported this issue on the correct channels but were essentially ignored.

We've rolled out a new GPO solely based on this issue that blocks all updates until fully validated by our internal team, step two will be to look elsewhere for enterprise solutions.

There's a false dichotomy being created here.  It is an unforgivable thing that MS allowed to happen, and it is a mostly unforgivable thing to not have a conscientious backup plan, especially since we know that MS has a history of this kind of failure.