As a new member you won’t be able to post any images yet, see this for why not:
Can’t post an Image or a Weblink?
Have you tried each drive in turn connected directly to a USB port rather than to a hub?
Or tried swapping say E and G on the hub to see if G can then be scanned in that port on the hub?
(The ports on a hub may not be functionally identical).
PS. Do you really need to recover data from all 3 drives?