I first bought my Alienware Aurora R7 and it had a single 2tb HDD. After a couple of years I had received and installed a Samsung 850 EVO tow which I migrated my Windows OS. Just now I bought and installed a Samsung 970 EVO Plus 2tb SSD into my Aurora R7's m.2 NVME slot in which the intel optane memory was previously installed. I migrated the OS from the 850 EVO to the 950 EVO Plus and formatted the 850. Both of those are recognized and working just fine. However, ever since I installed the 950 EVO Plus in the m.2 slot, the initial 2tb HDD has no longer been recognized. I need help troubleshooting.