The point is if you want to do things which requires permissions on your local system, use something with permissions on your local system
TiddlyDesktop
Browsers treat file:// links as possible threats and whilst you can do some things with them, try file://C:\Users\username\Documents in your browser address bar, it will allow you to browse your file system but you can only "download" the files you find. The browser is "protecting" you.
If however in TiddlyDesktop which is a local application (with built in simplified browser) without the security limitations a browser on the internet deserves, tiddlywiki allows;
- Open Excel file://C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Excel.lnk
- Visit my Printer on the LAN http://192.168.1.228/PRESENTATION/HTML/TOP/INDEX.HTML
- Open a document in its default app [[filename|file:///C:\path\folder\worddocument.docx]]
- Open a folder in WIndows Explorer [[filename|file:///C:\path\folder\]]
I have tiddlers with custom fields such as "desktop-link" containing a link and a macro to prefix it with file:// if is starts with C:/ D:/ etc...
On tiddly desktop try the `<$browse>` widget to import files.
Regards
Tony