The day before Hur's testimony about Biden and classified documents, CNN published an interview that offers new reason to think that Trump kept some classified documents even after the FBI search of Mar-a-Lago.
https://www.washingtonpost.com/politics/2024/03/12/theres-new-reason-think-trump-still-has-classified-documents/
Analysis | There’s new reason to think Trump still has classified documents

A former Mar-a-Lago employee bolsters the possibility that Donald Trump may still have classified documents at one of his other properties.

Washington Post
@pbump does the government keep a list of classified docs and who has them checked out? Like any library would, but for the nation’s most important secrets?