As I said, I thought the thumb-drive was a security pass or something, but thinking it over the data could have been just the pattern for the gun (which if I recall wasn't that big when we see the window later describing the previous pattern "printed.") It is strange that they wouldn't have the ability to "print" weapons considering how useful they can be (i.e. hunting, protection from wild animals). You can argue safety concerns, but they're so heavily vetting the people making the trip you'd think they wouldn't be concerned about psychopaths getting through. (Though Dr. Smith and Will were able to slip through the flaws or manipulations in the system.)
It's odd to me that Mr. Robinson, being military personnel, would need the approval of someone to "print" the gun. I could see him having sole access to the pattern (having the thumb drive) but why would he need permission to "print" it? He's military, I'd think the permission would be presumed.
Any rate, I've watched a few more episodes and had to stop for now. Just finished the one where Will tells the robot to jump off the cliff following the incident inside the Jupiter 2 with the woman, the gun, and Mr. Robinson.
Really liking Don West more and more, and full enjoy the girl playing Penny.