As more and more devices become able to gather and store data, lawyers in discovery soon will need to obtain information from a dizzying array of appliances and machines.

Only two decades ago, imagining the possible sources of discoverable information took little time or energy. It was in the opposing party’s file cabinets or, occasionally, in records from a mainframe database. Then came laptops, email, CD-ROM, flash drives, smart phones, tablets, collaboration software and cloud storage. Sources sprang up everywhere, and Big Data became the new mantra.