MaY have to buy a new encloser. Sounds like the controller card in the new case has a firmware limit size on it. Try seeing if wd has firmware update for it.
I have already upgraded the firmware on the WD Elements enclosure. These also came in 3Tb version so I am hoping that a 4Tb should work in that enclosure.
The original WD My Book enclosure presents the drive with LBA I think, with encryption. I need to somehow reformat the HDD so that it can work in the WD Elements enclosure.
WD have a WD Align program to align the sectors but I don't understand, I think it may be for WinXP. I am using Win 7 32 bit.
Anyone tried this?