Hardware wii backup manager

[hards]

hi i have got a wd my book essential 2 tb drive for my wii ames when i try and format to either fat 32 or ntfs i get a error from wii backup manager and it crashes but if i format to wbfs it will only go to 500 discs for a 2tb drive is that right at the moment i am having to copy from 1 drive to pc and then copy from pc to no 2 drive i thought that you can transfer from drive to drive thanks