Warrick: When we checked the flash drive I found in Jill's drawer, we found more than meets the eye.
Greg: It's a Transformer?
Transformers are toys that fold out from everyday objects such as an animal or a car or other vehicle into robots. In the story universe (developed by Marvel Comics) that goes with the advertising, the robots are intelligent entities, the good (Autobots) fighting the evil (Decepticons).
The toys were developed in Japan by Takara Co. in the early 1980s and sold under licence in the US by Hasbro starting in 1984. The two main advertising taglines for Transformers were Robots in Disguise and More than meets the eye.