Thread:Project:Support desk/Local File Links?/reply (3)

If those files are accessible through HTTP, just put a link to it. This is the most convenient way: Publish the folder containing those files on a web server. Be sure to use a hostname/IP accessible from all users accessing the wiki.

If they're network paths, you can enable the file:// protocol editing $wgUrlProtocols. Be sure to edit it right as explained on that page.