I purchased this following the comment on JED below that file delete on source server would be added to a later version. That comment was from 2010 a year later and we are on version 202 and despite the feedback below, comments on the forum etc this component does not delete files on the source server after uploading to s3. Furthermore I have posted to questions to the Joomart support forum and 6 weeks later have not had a reply. I raised a support ticket requesting an explanation of the functionality and the response was to ask for administration to login to the site? Response to the support ticket was a link to the tutorial explaining how to delete files on s3. I made it quite clear I was referring to the deletion of files on the source server after uploading. I would steer clear of this component unless you want CDN functionality. If you're looking to synchronise and upload files do not use it. A waste of money and a very poor user experience.
Feature to upload and delete from disk is already present in the extension along with the pull from s3 storage back to Joomla!