WDX4000 recovery process ends with - storage bad - drive not part of the array

WD Legacy Products Sentinel Products
5

If you have not done diskpart/clean on the old drives you can try raid recovery software. You get a couple of dual usb caddys and hook them to a windows pc.
The software is normally free to look and if you see your data you pay to drag and drop
I suppose if you already had the drive docks you could look even if you have cleaned the drives. It will work with one missing drive out of 4