Just to add to what Dieter wrote -
How does your "content creator" notify you that there are new files for you to download?
I'm asking because it's likely that they are already doing what I want to suggest. Which is: use Content Rules to automatically send you an email for every new file that was added. The email will contain a link to the new file. This is not exactly what you ask for, but at least you can use your emails as To-Dos: file them in a special folder, and archive each one when you've downloaded the file it links to, so you can keep track of what's still not downloaded.