I think it's tough to say. There's considerable overhead to packeted traffic. Also it sounds like they had a simple setup so there would be a delay in exchanging the DVDs after each one finishes. Uploads probably finished over the weekend with nobody there to start the next one too.

Sooo... not a lot of data. That's kabdib's point.

This isn't the 90s or something, a couple of terabytes is no longer "big data".

They're probably not allowed to take the data out of the building for security purposes ...