I did some work with the public data sets. The data is stored (free of charge) via ebs (look at the EC2 instance) which persists to S3 but is not visible in or

I did some work with the public data sets. The data is stored (free of charge) via ebs (look at the EC2 instance) which persists to S3 but is not visible in or directly usable from your S3 directory. If you decide to transfer the data or run computations (e.g. via emr), you'll then pay for the resources used. I didn't find the documentation all that clear to efficiently use the public data sets, which had financial consequences. If anyone is adept with using the public data sets, I'd love to speak with you.