Hello Ron-
You can link to a file download in much the same way as any other link, depending on the type of file you’re linking to.
For example, links to ZIP files will download automatically, while links to image files and PDF’s may open natively in the browser. In order to force the download, add the word “download” to your HTML link. Here’s how to do that:
Highlight your button, and switch over to the text editor. Your link will look similar to the following:
<button><a href="/wp-content/uploads/your-download-file.pdf">Download Now!</a></button
Inside the <a> element, add the word download, like so:
<button><a href="/wp-content/uploads/your-download-file.pdf" download>Download Now!</a></button