Check that there is an Operating System on the drive.
Drives without an operating system can't be used as boot devices.
Update BIOS
Verify the latest BIOS is installed. BIOS updates are available on Download Center.
Check the drive connection
For M.2 drives: Make sure the drive is fully inserted into the M.2 slot and the screw is secured to the stand-off.
For 2.5" drives: Make sure the drive is fully seated in the drive cage. Check that the drive cable is properly connected to the onboard SATA header.
Check if BIOS detects the drive
If it's not there after completing the above steps, the drive may be defective.
Check Boot Order in BIOS
If after following the previous steps, the storage devices still are not working, try using a different storage device. You can also contact Intel Customer Support for further assistance.