Just received my replacement RMBP and starting to do my setup and file transfer all over again. I ran into this issue last time, but then noticed the dead pixels, so I backburnered the problem - until now. On my 2010 Unibody, I have all my music set to copy to iTunes. When I go to the iTunes folder that contains all the music, it only shows ~3900 total files. My iTunes library shows 10,658 items, 40.3 days, 90.56GB. On my original Retina (now replaced), since I couldn't find all the files, I just downloaded them all from iCloud. I was able to get 10,570 via download. That iTunes library shows 10,570 items, 39.5 days, 101.18GB. Questions 1. Any idea where the 10,658 files/songs are located on the 2010 Unibody? I have searched every folder I can see thinking I might have jacked up the directories. I even picked like 200 random songs, selecting 'Show in Finder', and it brings me back to the same iTunes folder. When I select all, only gives me ~3900 files in X folders. 2. Why the 11GB difference in library size between the 2010 Unibody and the original Retina?