Hi,
Your question makes no sense, because WordPress pages are not “files” that can be copied somewhere (rather, they are CMS pages output on-the-fly from a database), and Amazon S3 is not a CMS hosting platform that can run WordPress. UpdraftPlus *can* clone a WordPress site onto Amazon’s actual hosting platform, EC2…. and it can create a backup of a WordPress site onto Amazon’s object storage platform (S3). But it sounds like you are confusing the two Amazon services.
Best wishes,
David