Locus Action XML

I am trying to create an XML file that downloads and saves a file to a specific location in Locus. I would prefer to start the Locus action using a QR code or a link.

I have tried to create the file based on the template in the instructions at https://docs.locusmap.app/doku.php?id=manual:advanced:customization:actions but how do I start the file? I would also need support on what the storage path should look like. Perhaps someone would like to share a working example. My XML file looks like the attached file.