Can a trigger open the Resources tab

I don't see any benefit to following the steps above since adding a file to a slide that already appears in your Resource doesn't actually duplicate the file in any way. That's because when Storyline publishes the output, any duplicate files in the course with the same name are only contained once in the output. You can confirm this by testing the duplicate file process, then going to the published output folder location, look in /story content/external files. In fact, pointing to a file in the resources tab can cause more work since any future changes made to the file name or location of files in the resources tab, will require you to make updates to the triggers that are pointing to these files. If the necessary changes aren't made to those triggers, you're then left with a broken interaction. Unless you are keeping file names the same after each update, the process above does not lead to a reduction in file maintenance when changes are made to the Resource tab files.