According to The New York Times, Donald Trump resisted returning official materials from his presidency, even as the National Archives spent a lot of time trying to get them back.

After learning that two dozen boxes of presidential records material had been moved from the Oval Office to the White House residence, officials with the National Archives spent a lot of time trying to recover them.

All official material must be handed over to the National Archives when a president leaves office.

The National Archives contacted two former White House officials who were supposed to represent the former president and try to get the documents back.

Three advisers said that Trump called the boxes of documents "mine".

According to The Times, the National Archives wanted to take back Trump's original letters with Kim, as well as the note that Obama left Trump before he was inaugurated.

The FBI raided Trump's Mar-a-Lago resort earlier this month, seizing 26 boxes of documents, some of which were marked as classified.

More than 300 classified documents from Trump have been retrieved by the government, according to The Times. The former president returned a first set in January of this year, his Justice Department aides gave a second set in June, and the FBI claimed more material in the August raid.

It's not known how these documents are traditionally stored in the White House or how they would be stored in the National Archives, but several people familiar with the investigation told The Times that the FBI found documents in a container that was in a closet in Trump's office.

A representative with the Justice Department didn't reply to Insider's request for comment.