I have a 320GB hard drive installed on my uni Macbook that's only reading 19GB free. This is after setting aside 45GB for Boot Camp, installing iLife 09', and putting 102GB worth of music onto the harddrive and into iTunes. Does this make sense? That doesn't seem like nearly enough stuff to take up that much space. Lets see: 45GB for Windows 102GB for music folders 25GB (roughly?) for OSX, Office, iLife 09', standard pre-installed OSX programs. Shouldn't I have about 125GB (more or less) of free space? What could be the problem? Is there a way to see which folders or programs are using up the most space on my harddrive? Does iTunes duplicate the songs you import, thus doubling the amount of space my music takes up?