Generate a sharable link; this will include a unique ID similar to the one in your query. :
Unique strings like 8pgpfr4vf191 act as an address for a specific file stored on a server. When a user clicks a link containing this ID, the hosting service retrieves the associated data. Download File 8pgpfr4vf191
For , you can host the file externally (like on Google Drive) and link an image or button to that URL. Turning Posts into PDFs : Generate a sharable link; this will include a