Datatrax are a Transformer's memory and data storage system. They are connected and part of the Cognitive circuits built in to the CPU , and directly connected to the Spark chamber. They also hold the genetic information, a coded version of an Organic's DNA, of a Transformer. Dictating what size, faction, and general appearance of the individual.
They can be altered with illegal shell programs. These can corrupt the Protoform, turning him either Autobot-Decepticon, or Maximal-Predacon.