I've been reflecting on it more since we last talked about it, and I think maybe the most likely case is that the Hillary State Department -- or at least her clique of advisers and aides, as well as non-DOS personnel from her faction like Sidney Blumenthal -- were just completely careless about classification. It's less likely that they downloaded or wrote down information from the TS system to transfer onto the private email server than that they summarized what they'd read on the TS systems in unclassified emails. Quite possibly she and they believed this was perfectly safe to do, as they controlled the server and were only talking to other members of the trusted in-group.Yep.
Hillary’s classified missives weren’t sent to just State Department personnel. She also disseminated highly classified information to private citizens who did not have security clearances. In this 2009 e-mail exchange, for example, Clinton sent confidential classified national security information to Sidney Blumenthal, a shady former Clinton White House operative who the Obama White House banned from federal employment... The bulk of Hillary Clinton’s message to Blumenthal was redacted, under codes 1.4(D) and 1.4(B) because classification authorities determined it contained classified information “which reasonably could be expected to cause damage to the national security[.]”