I just got a new mabook 2.4 ghz. This is my first time using mac. On my PC I have a ton of music/video/photos that are on an external Western Digital Hard Drive. Is it possible to connect my macbook to that hard drive while still having it connected to my PC? I wouldn't be using the Mac and PC at the same time. I was able to get my monitor connected to both, so I'm hoping there's a way to do that with my external hard drive as well.