WD My Book Studio Not recognized

Hello,
please help! I have a WD My Book Studio Edition with a very valuable amount of film on it that I need to be able to access. It was created on a Mac, but I use a PC Vista edition. I need to be able to see the info, but when I go into the devise manager, it shows the drive, but when I look at properties, it shows it to not be initialized. If I initialize the drive, will I be deleting the content????? as I said, this is over $15,000 worth of filming and can't afford to make a mistake!