Have you tried connecting this HDD into another system? What happens if you access the BIOS is it being recognized there?
Here we may have two possible options:
1. If the HDD is recognized in the bios, try another operating system image. Also make sure the HDD does not have partitions or a format so you should consider formatting the HDD.
2. If the HDD is not being recognized in the bios, you should try it into another just to confirm that the HDD is either a working unit or not. Besides this step, testing a different cable may work. Consider doing a bios update for the unit. Here is the latest version:
This unit comes with a daughter SATA card. This is the bay where you can connect a 2.5 SSDs so if you do the above steps and it is still not working my recommendation is to contact our support center: