Additionally to backups. you may want to look into a complementary approach that is versioning your wiki (when working with it locally at least), which is more user friendly from the perspective of having to track which particular change broke your wiki.
Here’s an example reference (easy) webdav saving à la Timimi - #2 by vuk
But since you seem to be using Windows, somebody else would have to step in to provide instructions about getting Git in Windows and rewrite the Bash snippet above, maybe using PowerShell.