Based on your setup, they will only able to get the freebie file once they sign up and confirm their subscription.
As a workaround if a person only wants the file and not subscribe you can add the file on your landing page itself. Add a section that says you can download the file here without subscribing.
You'll need to add a link section or just upload the file.
Or create a button and add the URL of the file as a PDF.
You can check this guide here: How to add images and video to forms and landing pages17
I hope it helps. If you're still having issues or need further assistance you can always reach out to firstname.lastname@example.org.