Upgrade my MyBook Essential 1TB USB3.0

[wildchild]

Wanted to post my question here but the thread was closed.

I got this WD MyBook Essential 1TB USB3.0 and replaced the HDD with a WD 3TB Green. I then connected the USB3.0 cable to my PC running Win7 64-bit OS but only 1TB of unformatted data was recognized. Any idea how can I get it to work?

PS: I used the WD MyBook Essential 1TB as a internal drive on another PC and it work fine.

[John012]

The controller on the enclosure those not support drive expansion.

As you can see it will only show the capacity that is expected to have.