OS 5 upgrade killed my unit, can I swap drives into a new one?

I clicked the button to upgrade my Mycloud Mirror to OS5 and the upgrade has killed the unit. After an hour I manually restarted it and the power light is flashing a quick blue and I can’t connect to the device over the network.

I have a second MyDrive unit which I kept as a spare - can I just put one of the disks in my broken unit into the new one and it will keep the data intact? Thanks.

Managed to connect via an address I found here (something with ‘local’ on the end) and then reset the password using the 4 second reset