How to delete files transferred successfully by Datasync?

DataSync does not provide an option to delete files from the source location. An option could be to configure the tasks log level to Log all transferred objects, files, and folders. CloudWatch would then contain a list of transferred and verified files that can be used to delete files on the source.

Here is a link to a blog that also discusses using CloudWatch logs to perform post-process activities on transferred files. https://aws.amazon.com/blogs/storage/post-process-your-transferred-data-with-file-level-logging-in-aws-datasync/