How do I duplicate or move a carrierwave image that's stored on S3?

Media page for controller:
User can upload an image.
User can also create a folder.
I want the user to have the choice to either move or copy the uploaded image into the folder.

I've looked around for a few hours and closest solution I found was this gem: https://github.com/equivalent/copy_carrierwave_file but I don't understand how to use it in my situation - there are no docs, just a quick setup example.

Any ideas?
Thanks!!