You forgot filenames like "CON" or "aux" or "NUL" which are disallowed on Windows entirely. Also having filenames that differ in capitalization only. And hard l

You forgot filenames like "CON" or "aux" or "NUL" which are disallowed on Windows entirely. Also having filenames that differ in capitalization only. And hard links, don't use those. And paths that are longer than whatever is the limit on NTFS (it's not very long). IMO it's better to just avoid file systems altogether if you can and put everything in a database.