Opening external pdf files on ankicards

(how) is it possible to start links to local files on anki cards?

all the infos of book are on an ankicard.and I can search

for specil topics.

Then I 'd like to start directly from the card , without changing to another file commander.

I want to import the relevant file name and ask how to put a foeld on the deck for starting the (pdf-)files.

Thanks ,

Hopkin