Update...
Brought the Seagate Barracuda 3 TB into work, hooked it into internal SATA on workstation, cleaned via DOS then re-initiated and formatted via Disk Management. I still can't see the drive via Android OS, but can R/W to it via USB from my PC/Laptop to Q10.
So, yah... I'm still in the same spot where I have a Q10 PRO, that in essence functions like a Q5. Have tried pretty much every FAQ, help article, format option, etc... and can read the drive via USB (so I know the SATA ports are fine on the Q10. It just doesn't register the drive via Android 7 OS.
Can the futeko admin please reply and either give me some further ideas, or some sort of partial refund or RMA instructions?
TIA!
ETA: I DO NOT have a USB cable attached when I'm trying to read the internal HDD in Android 7. Just the box with the internal drive hooked up to my HTS.