Microsoft did this to me after a routine update. I got varying pieces of advice from Microsoft advisers - not employees - I had no read idea who they were. I was given some instructions to put everything back - I think you can see it on the thread here, but it was only partially successful. I put everything on a portable hard drive and now keep all my photos on it. I was advised by the computer shop I visited not to use the cloud and now do not sync to the cloud. I now don't get constant messages that my cloud storage is full and to buy more space!
I was annoyed that Microsoft had the audacity to get my files and move them all, there was a message that I could press one button to make them all public. Why would I want to make photos of my family public?
Microsoft have zero customer service. The phone help just cuts you off.
I would go to a computer shop or get help from knowledgeable friends, them move to Apple.