I am about to receive my retina MBP, specs in signature, and I have a dilemma I don't know how to solve. I have an iTunes library composed of about 20GB of music and 800GB of movies and TV shows, mostly ripped off of DVD's. I have a portable external USB 3.0 1.5 TB HDD. I want to have my music on the MBP so I can listen to it anytime, but the videos on the external Drive because they won't fit on the internal. That, I can probably figure out how to do. My real question is how to trick iTunes into moving any movies or TV shows I buy through iTunes to the external drive and all the music to the internal SSD. Has anyone run into a similar problem or have a solution?