Well, it is clear now. Trump wasn't storing some random top secret nuclear document. He had his engineering notebook from when he created a nuclear weapons system that nobody has ever had.
Trump once revealed that the US had a new secret nuclear weapons system that 'nobody's ever had': book
Bob Woodward's reported in his 2020 book "Rage" that sources later confirmed Trump's revelation, but were "surprised" the president disclosed it.
www.businessinsider.com
Donald Trump once boasted to a reporter about the nuclear information he had.
In Bob Woodward's 2020 book "Rage," the journalist detailed a conversation with Trump in 2019 in which the then-president described a secret nuclear weapons system he credited himself with creating.
"I have built a nuclear — a weapons system that nobody's ever had in this country before. We have stuff that Putin and Xi have never heard about before. There's nobody — what we have is incredible," Trump reportedly said.
Woodward wrote that sources confirmed the new weapons system existed, but were "surprised Trump had disclosed it."