Install wd elements external hard drive. I bought a new Toshiba A200/H01 notebook that runs

Question

I bought a new Toshiba A200/H01 notebook that runs Windows Vista. I have tried plugging in my Western Digital Elements 320gb Hard Drive but I am unable to open it. When plugging it in, it updated the driver automatically and if I go to Device Manager I can see that the hard drive is there. However when I go to Computer (Start Menu) I am unable to see it there. Can you please help me, am getting frustrated as it had alot of important photos on there.