The human brain does not need to store all the information in the environment in the genome to develop fully, so why should an AI need to? I expect an AI would include that data in the development of it's brain just as a human does, by being put in an environment to learn from and absorb that data. In other words, design and development are different kinds of data here, and a human's and an AI's initial brain design can be stored in ~50MB of data.