A family of Microsoft products that enable users to capture, organize, and reuse notes electronically
Sorry for the delayed answer. I wasn't able to write earlier.
Indeed there is a backup function.
In the latest 16.61 update two weeks ago it was reset to a default location.
Everything again disappeared.
In the version of last week and this week the problems aren't occurring anymore?
Update version 15.61 -> 15.62
Now: 15.62.22050301
No idea what happened of why it occurred so frequently
H.