Re: It's a no-brainer - they didn't
"Hacking TB of data, - it would have taken them months and several at that to grab all that data."
The North Koreans are smart, they must have figured out how to compress the TB data down to MB. They also probably found out that they maybe caught in mid download, so they decided to do a second hack to the cloud and move the data there.
In all fairness, the advanced folks are only able to compress a 1Gb file down to about 100Mb, so this is not likely. I am also guessing that North Korea does not have massive amounts of disk space either.