Need to start over with new clean drives

Sorry for the dumb question, but I was handed a “failed” My Cloud Mirror device . . .have two new drives (2TB), which I’ve connect to a Win10 machine and created a single partition on each and formatted NTFS with no drive letter . . .I’ve done a 40-second reset on the device. . .When I install the drives and connect the device to the network, I get a solid blue power light, but two solid red lights on the drive status . . . the manual doesn’t address a solid red drive light (both drives)

My network doesn’t see the device (from the arp table), and the standard http://wdmycloudmirror doesn’t find it . . .

Do I need to configures the drives differently before I put them in the device, or is there something I’m missing here?