I recently had the hard drive on my macbook laptop completely blow. I've had the hard drive replaced now but I have lost all my data from before, most upsettingly my entire i-tunes library, much of which was music bought and downloaded online, as nothing could be recovered. I wanted to copy the itunes library of a friend of mine to give me some music once more and was thinking in investing in a external hard drive to preserve any future losses next time my computer breaks. My friend has a PC and I have a macbook, would it be possible to back up all of his itunes library onto an external hard drive (such as the one being sold here) and then transfer (or copy) this on to my mac computer? Any comments on this would be very very helpful as computers aren't exactly my area of expertise!