I have 2x3TB MyBook drives on the WDTLIVE player for about two years and they present no problem at all. So your problem may be with the specific player or the specific drives - check them out, as well as making sure you have the latest firmware. On the WDTLIVEHUB, however, I only have a 1TB passport connected and I was planning to connect a 3TB on the second USB drive so is there an answer to the original question?
(BTW are the USB drives on WDTLIVEHUB USB2 or USB3?)
