I just bought a MyBook 3.0, 1 TB, including USB 3.0 Card. I installed the card driver, plugged in card, connected MyBook and it starts (HDD spins up), but my Win doesn’t see it as an external drive.
I update driver with the new one from the download page and I updated my WinXP to SP3. But it still does not work.
Connecting the MyBook to a USB 2 port works without any problems. I can access the drive, read / write data.
System’s hardware manager lists a NEC Electronics USB 3.0 Host Controller and Root Hub.
Another, minor important thing: when I pressed the power-button on the back for the first time, I heard a cracking sound and now I can push the left side of the button deeper than the right side.