Excerpt from NPR
On four occasions, classified documents were found at Biden's private residence and a D.C. office he used before becoming president.
Early last November, Biden's personal lawyers were packing files from an office he had in Washington for his work at the Penn Biden Center for Diplomacy and Global Engagement, a think-tank founded by the University of Pennsylvania.
There, in a "locked closet," the White House said, they discovered some classified files that should not have been there. The documents were turned over to the National Archives.
Then, on Nov. 4, the National Archives inspector general informed the Department of Justice of the discovery. By mid-November, Garland had tapped John Lausch, a Trump-appointed U.S. Attorney in Chicago, to oversee an assessment of the materials.
On Dec. 20, Biden's personal counsel Robert Bauer informed Lausch that another set of documents had been found that day in the garage of Biden's private home in Wilmington, Del. Those documents were soon secured by the FBI.
On Jan. 11 — two days after CBS News broke a story about the documents — Biden's personal attorneys searched his homes in Wilmington and Rehoboth Beach. They found one classified document at Biden's Wilmington home.
On Thursday, the White House described the review as being over. "The search is complete," White House press secretary Karine Jean-Pierre told reporters.
But on Saturday, Sauber, the White House lawyer, said he had found five more pages at Biden's Wilmington home on Thursday when he was working with DOJ officials to hand over what he had days earlier described as one final page of classified material.
Link: https://www.npr.org/2023/01/14/1149071576/biden-classified-documents-what-we-know