My Cloud mirror gen2 keeps crashing when both drives are attached

[NAS_user]

Yes.

My Cloud Mirror Personal Storage Drive User Manual (wdc.com)

My Cloud Mirror Gen2 4TB Power Supply Spec? - My Cloud OS 3 Personal & Network Attached Storage / My Cloud Mirror - WD Community

This devices want a 36w (12V x 3 amp) power supply.

The one in your hand appears to be a 12V; 1.5A = (V*A = P) 18w charger.