Welcome to the Cove. Requirements for manufacturing are found in 7.5 Production and Service provision. The overall section 7 Product Realization is where you need to focus. As the org responsible (or theoretical org), you must write (create) content that meets the requirements. What is the product? How is the product specified? What are the components or materials in the product? How are these sub items specified? The medical device file is explicitly defined in 4.2.3. Based on the product you are making, create content that aligns to 4.2.3 for EACH sub part. You know the product; you create the content that aligns to 4.2.3. I suggest you focus on definitions and read with great care. Very few individuals are expert in the entire standard. Good luck, have fun, enjoy the ride / theoretical ride. Hope this helps.
One more. If you can share WHAT product you are thinking about, I suspect you will get better feedback / questions to think about as you create content aligned to each explicit requirement of the 13485 standard.