chromium/ui/file_manager/file_manager/foreground/images/filetype/filetype_folder.svg

<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20">
  <path d="M16 5h-4l-2-2H4a2 2 0 00-1.99 2L2 15c0 1.1.9 2 2 2h12a2 2 0 002-2V7a2 2 0 00-2-2zm0 10H4V7h12v8z"/>
</svg>