I'm trying to come up with the best way to back up my files. I don't have the best back up system right now, and I've had a hard drive die on me before and I lost all my files, so I'm trying to come up with something. I've read posts on this board about how people have one external drive for Time Machine and then another for media files. Is this the best way to go? I'm not all too familiar with Time Machine since this is my first Mac, so I'm not entirely sure how it works and why some people use two drives.