Three sources with knowledge of the matter told The New York Times that Eric Herschmann, a former White House lawyer, warned Donald Trump about the legal risks of keeping presidential records.
The meeting with Herschmann, who was no longer serving as legal counsel for the former president at the time, occurred in late 2021.
Sources familiar with the matter told the NYT that Herschmann stressed the legal liability of keeping the classified records.
The National Archives and Records Administration received the first batches of documents from Trump. It contained letters from Kim, who Trump said he exchanged "beautiful" love letters with while in office, as well as a letter from Obama.
The FBI found 12 more boxes of documents when they searched Mar-a-Lago in August. There is a legal battle going on between Trump and the Justice Department.
The office of the former President didn't reply immediately.