Hey Guys, I am .... excuse me, was, a PC user for 16 yrs (I'm 28) and finally made the big switch to MAC. I know very little of how it works and since the delivery yesterday of my MAC Pro, am SURPRISINGLY finding it difficult to get use to. So I was thinking that perhaps some of you very kind people could shed some light on simply one of my many questions ... lol Here it is, and I know you must think I am ridiculously unintelligent; How do I add my external devices? For example I have a Western Digital 500 GB drive, I plug it into the wall, connect the USB and get nothing. How do I get my computer to recognize the device. Silly hey?! ... lol I tried going to the website to download the drive for OS X Leopard and still not recognition, any ideas?