MY CLoud Yellow Light flashes

I had tried to connect a 6 TB My Book through the USB to an older single drive 2 TB MY Cloud as an extra drive. But the system just went into a tail spin and the front light just flashes. There are no lights on the rear. I disconnected the MY Book and still cannot access the MY Cloud. I tried a 4 sec reset, still no function.

I am unable to access via the web portal and a network scan does no show the static ip assigned or even the MAC number.

I have it connected through a netgear unmanaged 8 port switch just as with all other equipment and this works fine.

any help appreciated.

What is the format of the My Book drive? The single bay My Cloud ONLY supports the following formats:
NTFS
HFS+
FAT32