I received my very first MacBook for Christmas and I'm enjoying it so far, just have a few questions. Firstly, if I buy movies on iTunes but don't want to store them on my MBA, what is the best way to store them? Can I use an external hard drive? Same with songs, I don't want to have a bunch of media on my laptop like I did with my last one because it slowed it down so much, am I best just putting everything on my external hard drive? Thanks!