One thing about Clapper and Brennan, they’ve played games before and know to keep documents/recording/etc for ‘get out of jail free’ cards. One of them will be the one that brings this whole thing down, IMO.
A 64 GB thumb drive can be purchased for about $10.
That's enough storage for about 30 million pages of text information.
Any of those top-level guys would have the ability to plug one of those into his work computer and download a lot of insurance policy.