We'll talk about the flip-side of data retention and archiving: getting rid of what you don't need to keep. We may also talk about how your communication and messaging apps may be saving lots and lots of data.
On the topic of security, this article from The Atlantic raises some good points. It starts from Henry Stimson's famous line: "Gentlemen do not read each others' mail."
Washington Post article: What We Lose When the World Moves On From Email. Read here.