Unfortunately the header is misleading. The FAQ says:
Q: Can I export data from AWS with Snowmobile?
Snowmobile does not support data export. It is designed to let you quickly, easily, and more securely migrate exabytes of data to AWS. When you need to export data from AWS, you can use AWS Snowball Edge to quickly export up to 100TB per appliance and run multiple export jobs in parallel as necessary
> Migrate or transport exabyte-scale data sets into and out of AWS