Somebody knew about Seal Team 6.
Bingo! If you watched the FBI director when the Repubs started to inquire about some things that might be in the emails, he immediately started to throw it into secret meetings. We will never see the top secret emails that she didn't protect, but the protection is sure on now. It could be anything on any subject that we would find horrific. Maybe discussions on transferring Gitmo prisoners, or negotiations for giving up the 5 Taliban for a traitor. The mind boggles over what could be on the server no one knows about. Maybe emails to Epstein over getting a 10 year old or a 12 year old for the weekend, or trading $2 billion of munitions going to the Kurds for $10 million to he Clinton fund. I'm sure there are emails that even Repubs on the intelligence committee have no clue about and can't even receive a briefing.