The content division at a digital media agency has an application that generates a large number of files on Amazon S3, each approximately 10 megabytes in size. The agency mandates that the files be stored for 5 years before they can be deleted. The files are frequently accessed in the first 30 days of the object creation but are rarely accessed after the first 30 days, however, immediate accessibility is always required. The files contain critical business data that is not easy to reproduce. Which solution is the MOST cost-effective for the given use case?