Cerro Flow Products satisfied Illinois Supreme Court Rule 201(n) by providing a 63-page privilege log for the hard-copy records it withheld during discovery in a St. Clair County class action, but Cerro says it thought plaintiffs’ counsel agreed to a less onerous method for handling privilege claims involving 3 million digital documents.In 2017, Cerro developed an eight-page list of search terms designed to identify electronically stored information, or ESI, that was protected by either attorney-client privilege or …