Download all externally linked mediafiles in the given namespace and its subnamespaces.

If your DokuWiki runs on a Windows-Server, you can choose whether to download
  * only files linked as a commen external file (e.g. ''%%{{https://www.example.com/file.pdf}}%%'')
  * only windows share links (e.g. ''%%[[\\server\share\file.pdf]]%%'')
  * or both common external media files and windows share links

**Please do not close this page during download**
