Proud owner of a new Macbook Air, and am now trying to figure out how the hell to use the thing. Most of my issues stem from switching from over 20 years of strictly Windows experience. I put a bunch of my music and photos on the computer. About 20 gigs of music, 8 of photos. I then imported them into iTunes and iPhoto, and now when I look at my hard drive use, I have almost 40 gigs of music and 16 of photos. Is it duplicating the files when I import them? What is going on here?