“Confidential” Give me a break.
That can be just about anything, including someones shoe size.
True story - I could order parts for Marine Corps jets with a Confidential clearance; but I couldn’t work on the planes without a Top Secret clearance.
The FBI has no legal access to presidential papers. The president has total and absolute access to all documents created during his administration. This is Constitutionally not rescindable by any subsequent president.
The FBI and Biden administration are operating completely outside the jurisdiction and dictates of the US Constitution.