Hello,
what have you found out with the drives?
I have the same NVR bought in 2019 and the list
https://dahuasecurity.s3-ap-southeast-1.amazonaws.com/uploads/soft/20191114/HDD-Compatibility-List-for-DAHUA-Products-20191008.xlsm
says that it supports 2x12TB.
I bought a 12TB drive...