B&R Supermarket, Inc. v. Visa, Inc., No. 16-cv-01150-WHA (MEJ), 2017 WL 235182 (N.D. Cal. Jan. 19, 2017)

Key Insight: Court found requested data was relevant to class certification but, where Defendant indicated that Plaintiff?s requests ?encompass [ ] tens of millions of transactions and weekly data for each of the more than 6 million merchants that accept American Express? that ?is scattered over at least 6 databases at American Express,? court agreed with Defendant that the requested discovery created an ?enormous burden? and therefore ordered sampling, in a size to be agreed upon by the parties at a court-ordered meet and confer

Nature of Case: class action

Electronic Data Involved: Chargeback-related data (ESI)