The problem with those western digital passport is that they change firmware and even internal electronics without changing the name of the product. They have a partition on them that mounts as a virtual cd during the booting of the harddisk. On some models, you can disable this and you can recover the lost space. On others, you can just disable it. It's purpose is to give you access to the password protection tools. Even if you don't use them, the disk keeps requesting for the install of a special driver on your pc. I don't think the wii has such a driver. I want a no nonsense usb storage device that is compatible with the usb mass storage standard. Being a technician in electronics for several years, I am also pretty alergic to produts that can't be opened on a normal way. (But thats just me.) Maybe the timing of some of those WD passport is more critical than the timing of others. I don't know, and I don't have the time and the tools to find out.