When downloading a thin provisioned vm to USB flash drive it seems to be the thick provisioned size, not just used space from the thin provision. How do I get just the thin provisioned vm on a flash drive for easy shipping?

I built 2 vm's on my local virtual environment to be used in another environment across the country. I thin provisioned both of these vm's and then downloaded them from the data store to a USB flash drive. They came down the full size so how do you get the thin provisioned version on a physical USB device for easy transportation across country? Thanks