So I've been using my Macbook to listen to music ever since I bought it (I don't have an mp3 device). Often times if I hit a bump and my Macbook will stop playing the music for a second or two and then resume playing. I'm assuming that my hard drive disc is getting thrown around everywhere and it's getting scratched up right? Surely that's not good. So basically what I'm asking is - would it be worth it for me to go buy a mp3 device of some sort rather than my hard drive skipping on occasion? How bad is this to my hard drive?