What is the largest drive I can replace my existing drives with?

My Cloud OS 3 Personal & Network Attached Storage My Cloud Mirror
1

Hello, bought the 4Tb (2 x Tb) model and am considering putting in larger Red drives in there. Will it work with say 2 x 6Gb? Or even 8Gb drives? Thanks.

2

For this particular question it would be best to contact WD Support for guidance since the compatibility table is currently not available on the main website.