After that, you may use the built-in Windows Hardware and Drivers application to diagnose the drive. This program may be found in the Control Panel under Security and Maintenance >> Troubleshoot Computer Problems >> Hardware and Sound. These steps should assist Windows 10 in recognizing a second hard drive. If it still will not see the hard drive, then we will need to take out the disk to examine it.
How to Fix Windows 3 Won't Recognize or Detect a Second Hard Drive
Installing a second internal hard drive on a Windows 10 PC is as simple as this:
Check the BIOS to see if the hard drive is deactivated.
Navigate to Disk Management. Locate your second hard drive, right-click it, and choose Change Drive Letter and Paths. Go to Change and select the letter for your partition from the list. Assign the following drive letter to your computer: Close all windows and restart your computer after clicking OK. Your hard drive is now ready to be used.
Go to Search and put "device management" into the search box. Expand Disk drives, locate the second disk drive, right-click it, and select Update Driver Software. If any updates are available, follow the on-screen instructions to have your hard disk driver updated. After updating your driver, restart your computer for the change to take effect.
Boot to the Windows 10 desktop, then open Device Manager by pressing Windows + X and selecting Device Manager. Expand DVD/CD-ROM drives, then right-click the optical device listed and select Uninstall. Restart your computer after exiting Device Manager. Windows 10 will recognize the disk and restore it. No need to re-install any software.
Choose the second hard drive. Locate and pick the hard disk that you connected to the computer using the arrow keys. Set the hard disk to "slave" mode. Press the OK button.