Hey there again, @kdt1970!
Well, according to the screenshots from your Disk Management that HDD is not recognized by the system. I'd recommend you re-install the OS onto the HDD and then format this small SSD and configure it as cache for the HDD (I suppose this was the initial setup). The correct capacity should display after a proper
secure erase on the SSD.
Hope it works. Let me know how it goes!
SuperSoph_WD