“It’s also much less exciting than you’d expect. The vast majority of classified information is less “here’s the latest CIA report on Putin’s strategy in Ukraine” and more “because we carried out the radio test with encryption on, all data from said test is now Secret”.”

-- https://www.navalgazing.net/The-American-Secrecy-System

He should have kept them in his garage or on a email server in his bathroom and avoided this whole situation.