Atomos Master Caddy computer wont recognize

We have a 2013 Mac Pro in one edit bay and 2017 MBP in the other. When plugging in the new Master Caddy 4K dock with G Tech 1TB SSD, ALL computers say unable to recognize device. We have attempted to format, etc, but to no avail…

Which version of the Mac OS are you on? If you are on High Sierra 10.13.x then you might have to choose the view option in Disk Utility and select all devices. Then attempt to format both options of the external caddy. If that still doesn’t work then the device itself could be defective and you should get a replacement from the place of purchase.

Thank you Rydia,
Formatted both and that was the issue.