Is it possible to create a second sanbox environment for subscription billing? I would like to do a couple data migration tests using the postman and don't want to clutter my current sandbox or QA.

In order to migrate data from one environment to another I know I can use the transport feature but there are some manual components that I will need to do. I heard that getting Transport Admin role makes this easier. Is this true? What is this role ...

I need to migrate all of my work from the sandbox environment to the QA environment. Is their a Transport feature for SB or do I need to do this work manually?