Ever have to migrate from Rackspace Files to S3? I did. And I couldn't find a simple way to do it, so I made one. There's a service mover.io but it gave up after 25,000 objects. I had to copy 175,000. This is a Ruby script which will log into Rackspace, get a list of all objects from a container (paged in groups of 10,000 by default), and copy those objects to an S3 bucket.