Using pasport external harddrive with My Book World (white light)

I just purchased a My passport hard drive to back up My book world. When I plug in the the passport in My Book world is lock out under My Computer and has FAT under it. I can still access the data through the WD software but I was just hoping to be able to copy, paste and be done. Any ideas on how to get them to work together?

Do you have a My Book World Dual drive unit?

Are you connecting the Passport to the computer or the My Book World’s USB port?