I...I don't know...perhaps he thought he had declassified them and didn't think of them as stolen? After all....every President seems to take materials, classified or recently declassified.
But, once again...I don't know why he took them, and neither does anyone else. Again, that's my point. Nobody knows why he took them, but left wing media got ahold of that story, and here we are....discussing how "Trump stole top secret documents that he sold to the russians..."
And when the actual story comes out, and the truth is revealed, nobody is held accountable for liable and slander, nobody is held accountable for defamation, nobody issues a retraction, or apologizes for leading people to believe a lie. They just move on to the next hate story that they can use against their opposition..