My external OWC computing hardrive won’t recognize my Windows PC!
First, I would highly recommend an OWC external Hard Drive before purchasing any other brand. I first heard about the dependability of these drives for video editing and have had mine for 3 years now and it has never caused an issue.
The reason the Owc Computing hard drive will not work with windows is because they come formatted for Mac OS X. You must reformat the drive in order for windows to recognize it.

OWC Computing Firewire drive pictured. They are highly dependable and come with two years warranty, all the cables and can be configured with firewire 400/800 and usb2 ports.