The seller while adding or editing a product, can move to the second page(the page where media files are uploaded and upload files of any supported type like pdf, xls, doc etc.
This allows sellers to upload related user manuals, product specification, step by step instructions etc as a file. Clicking on ADD link, launches the 'Upload Resource' pop-up.
Seller can upload the file and enter a 'Display Name' which when saved, will be the name of the file displayed on product detail page.