Can I upload a document to a knowledge base article that customers can download?

Can I upload a document to a knowledge base article that customers can download?

For a specific article that is about how to build up a particular profile in a document, I would like to add a default document that we share with our customers in a training. In order for them to have acces to such a document at all times, e.g. in case they lose it, I would like to add the document to the article so that they can download it there themselves.


Is that possible and, if so, how? And, if so, are there restrictions to the type of documents?