Hi, So I have a 100GB HD in my MBP -- most of which is music. I'm planning to move about 25-30GB of music files to an external HD. What's a smart/safe way to remove all of these files? Should I just trash them? Or should I refromat/reinstall? Things have slowed down a bit on my machine, but not too much. I'm wondering if having all of my files spread out on my HD is causing this. Does reformating realign files after so much free space is opened up? Or, should I not worry too much -- my computer is still plenty fast. I just want to make sure there's nothing wrong with just getting rid of so many files. Thanks.