Upgrade from MyBook duo to My Cloud Ex

My Cloud OS 5 Personal & Network Attached Storage My Cloud EX Series
1

Hi guys,
I have a 12 T My Book Duo and I was thinking to upgrade to a My Cloud EX2.
Can I just buy a My Cloud empty enclosure and install the drives from the My Book?
I tried looking in the manual and online and I couldn’t find a clear answer.

Thanks in advance.