I have two hard drivers and a ssd, but one of my hard drives isn't showing up after I've switched between different OS's. I have a 1TB Hard Drive a 250 GB SSD, and a 320 GB HDD, but the 320 isn't showing up. Also, it's a prebuilt PC that I bought from someone. When I bought it was running Windows 8.1 and the hard drive was visible in "My PC." I updated to Windows 10 and it was still there. I downgraded to Windows 8.1 again and it was still there. I downgraded to Windows 7, but then it disappeared. Ever since that downgrade, even though I upgraded back to Windows 10, it doesn't show up in "My PC."
One more thing to note: Whenever I do a fresh install when I'm selecting my HDD/SSD I want to install my OS on there's an option for my 320 GB HDD. So, there's no wiring issues.
One more thing to note: Whenever I do a fresh install when I'm selecting my HDD/SSD I want to install my OS on there's an option for my 320 GB HDD. So, there's no wiring issues.