How do I make a PDF download manager with CMS and dynamic pages?

Question:
In short, I need to make a download manager specifically PDF, I need a dynamic page where the titles of the folders are represented and another dynamic page where the PDFs of that folder are displayed.
A folder can have 1 or several files

How can I do that? I have already made the data collection and its respective reference but I can’t list the PDF in a repeater.

Thanks

Product:
Wix Editor