You should read the article in politico.  I've included a number of relevant passages but there is a lot more included.
https://www.politico.com/news/2024/0...droom-00159182
 Lawyers found classified docs in Trump’s bedroom 4 months after Mar-a-Lago search 
 The revelation was contained in a newly unsealed opinion that a federal judge issued in 2023.
That revelation was among several cited by U.S. District Judge Beryl  Howell in a newly unsealed 2023 opinion that found prosecutors had  presented compelling evidence that Trump knowingly stashed national  security documents in his home and then tried to conceal them when the  Justice Department tried to retrieve them.
In her 
87-page opinion,  Howell said the likelihood that Trump committed crimes was a basis to  permit special counsel Jack Smith to question the former president’s  attorney Evan Corcoran on topics that would normally be shielded by  attorney-client privilege. Prosecutors, Howell said, had demonstrated  that Trump knew Corcoran had been tasked in June 2022 with informing the  government that all classified materials had been returned, “a  representation that the former president … knew to be wrong.”
Throughout the opinion, Howell — who was chief judge of the Washington,  D.C. federal district court at the time — described with varying degrees  of incredulity how four documents with classification markings could  have been discovered in Trump’s private quarters months after  prosecutors had subpoenaed them and the FBI conducted its own exhaustive  search of the property.
“Notably, no excuse is provided as to how the former president could  miss the classified-marked documents found in his own bedroom at  Mar-a-Lago,” Howell, an Obama appointee, wrote.