If not, use a boot CD called GPARTED to delete (all files are gone!) the partitions and then create new partitions then format the drive.
If that fails this put the HDD that is inside that case into a new case and try again.
I have a WD Passport and it was working fine until my husband plugged it into my daughter's computer. It shows up in device manager but not in my computer. When I try to initialize it via manage disks it tells me that the media is write protected and will not initialize. Any ideas of what I can do to fix this?