The hard drive is completely damaged following the installation of the new M.2 SSD.
The hard drive is completely damaged following the installation of the new M.2 SSD.
Turn off all additional storage devices, install a live operating system such as Windows 10 PE or Linux. Make a backup of your drive. The BIOS isn't Windows, clearly the M.2 is vying with your HDD for the D: slot. Open Computer Management, Disk Management, and allocate the M.2 to E: drive. Assign the HDD to D: drive.