More than ten years ago, the Zubulake case raised awareness of the importance of digital evidence in litigation. At that time, for many lawyers, the discovery process consisted of collecting paper documents, manually reviewing those paper documents, and responding to document requests by producing paper documents. Digital evidence existed, but was more limited in scope and volume than it is today. Back then it was often overlooked or not recognized as a potential source of valuable evidence to be obtained in discovery.
"Connected" Discovery: What the Ubiquity of Digital Evidence Means for Lawyers and Litigation,
Rich. J.L. & Tech
Available at: http://scholarship.richmond.edu/jolt/vol22/iss3/3