I have a “My Book Essential 3 TB” WDBACW0030HBK-EESN connected to Asus Maximus II Formula, admittedly not one of the latest, but still it had a higher pricetag at the time.
That said, it has an eSATA connecter. One of WD drives also had eSATA: not compatible…
After reading quite a number of threads concerning non-working PCI card, I very much hesitate to just
randomly buy a card and see if it works. I could as well buy half a dozen of cards at the same time and
ask the shop if I cud return 5 of them if, by mere luck, one is working …
But maybe someone out managed to get everything working?