HDD's not recognised in icy box 4 bay dock

Hi Guys
First post here,
For many years, (too many :)), have always used external WD HDD’s

have been using external WD HDD’s for image storage and back up and TM on the Mac
A solution to the clutter was suggested that a HDD dock (ICY BOX IB-141CL-U3 4-Bay HDD/SSD Docking Station)

As I had 2 TM back-ups of the Mac, I just “shucked” one and plugged that on into the Dock
wasn’t recognised - but could see it on the disk utility

Still couldn’t get it to show on the desktop,
Through the disk utility, I erased the disc and gave it a new name and have completed a back-up OK ! ✓

Now have 2 TM back-ups !

The problem is, I have thousands of images on another 2 drives (WD 4 TB each)
Erasing these drives is not an option, therefore I haven’t been game to shuck them

My “normal” process is to have all images on one HDD and then clone to another as a back-up using Carbon Copy Cloner

Is there a way I can get my image HDD’s to mount?

Regards,
Gary

You could directly connect the drive to USB port of the Mac and check if the drive shows up.

Thank you Jonty
Unfortunately it is a shucked HDD, not sure of the technical name but the “controller” ? has been removed to fit into the dock
Going to order a new WD Red NAS and make a clone first (30,000 + images)
Covid shipping may take some extra time
Then I will try and use the Mac Disc Utility to mount
…Gary