DNG is a RAW format. That means, you have to manually edit the picture. U need special tools for that and you can't use them with standard software. Most use 5/34. 5 for sharing and 34 for printing, watching on tv, ....
You would upload the 5 picture (34 is too big). But if you want to have more details and better zooming, just use 5+34. Upload the 5 picture and keep the 34 picture for further use.