Every normal file you create is actually a hard link already—it's just that there's only one link to that data. When you create a second hard link, you're telling Windows: "This data should also appear at this other path."
A hard link is not a backup. It protects against accidental deletion only if you leave at least one link intact. windows hard link
Some old software expects configuration files in hardcoded paths. Instead of copying (and then desyncing), use hard links: Every normal file you create is actually a