How to reset older WD NAS drive

have you tried by opening http://mybooklive  link on browser.

Or else connect your NAS directly via ethernet to a PC and check the ARP table by command arp -a and match the mac address with mac address printed on device serial number sticker, hope it helps

and one more thing you can try APIPA IP addressing too i mean 169.x.x.x scheme by not assigning any IP to your computer

Not really clear which model this is most of WD's legacy kit serials start "WDBA" is this a "Cloud" or "Live" device?
What's the description of the serial number label?
Have you got WD's Share Space software installed on your PC?  Most of their older NAS use this for configuration
The 4 second reset will have switched it from a fixed IP to DHCP so you can check your router configuration (or ARP tables ) to see it's current address if your router is handing out addresses.

WCAWZ are the letters that begin the S/N.

http://mybooklive/ goes nowhere. This device is plugged into a 24 port switch just like all the other computers and drives. The router's starting IP address is 10.0.0.1. When I scan IP addresses, there 4 IP devices that I do not recognize but none respond. For example 10.0.0.11. Is their a suffix I should try? I have installed the WD SSD Dashboard. All that does is show me the local drives and none of the NAS drives.

Photo? Honestly without the model it's going to be tricky to give you specific directions. Some you can browse with FTP through your browser, some need software locally installed on PC and others are configured online.

Here is a shot of the front and the bottom. What WD software can I use to see this drive so I can configure it? The light on the front is not blue. Is that good or bad?
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Using the MAC address on the WD device, assign a DHCP reservation to it, power off the drive, connect it to your new network, and power it on again. Confirm that it has the reserved address by pinging it. Now you know the IP address of the drive you are in a much stronger position to access it successfully. Try the various available WD utilities until you get a result.

If the device doesn't respond to the DHCP allocation or pings, it seems likely that the lightning strike that kicked the whole thing off has damaged it. If this is the case, then remove the drive from the enclosure and see if it still works; if the enclosure has to be damaged to do this, well, it wasn't working anyway... Either put the drive in another enclosure, or slave it to a spare desktop and see if you can recover the data that's on it. If the drive is dead then game over, unless you want to pay a specialist data recovery company to retrieve the files and folders on it.

I think this sucker is headed to the trash heap. The little light is no longer blue and it does not respond or provoke a response when I directly plug it into a laptop.

Before condemning it outright, check the power adapter - it may have succumbed to the lightning strike and is therefore unable to power up the NAS assembly. You can check for power by using a multimeter at the jack that plugs into the drive; no voltage confirms a failed adapter, but voltage within spec doesn't necessarily mean that the adapter is OK as it may no longer be able to deliver the required current for starting the unit. Substitution is the simplest approach if a suitable adapter is available to experiment with.

Well I think it is time. I came in this morning to a very odd low volume clunking sound.The light on the unit was still green and not blue. I may actually go out a buy another WD NAS drive and use any software that comes with it to try to talk to this drive.

The muted clunking sound strongly suggests two possibilities:

1). The drive has failed.
2). The AC adapter is unable to deliver sufficient current to start the drive.

I'd still be inclined to try another adapter if possible as this would be cheaper than replacement, and might save you the cost of another NAS unit. The symptoms you report could be the product of either case, and no amount of software is going to enable you to access the unit if it's electrically or mechanically faulty.

That is true. That green light must mean something. On the other drives it is blue. I will try swapping the power adapter.