hard drive upgrade for Notebook 15-DB0996na

[MAJiC1]

Hi

 I have the latest Bios (I updated on 25th May 2020) and it will not let me upgrade the original WD mechanical HDD - I use any other hard drive & it does not appear in Bios. Even when the original HDD is not connected the Bios is locked and shows only the original HDD name. Boot menu only shows the original HDD even when removed - does not show m.2 either. Any idea how I change the HDD or upgrade to an SSD?

[WAWood]

@MAJiC1 

Press F10 repeatedly while rebooting to get into the BIOS settings.

Once there, you have to disable Secure Boot, and you have to check to see if you also have a setting that Disables booting from portable devices.  If so, you have to disable that, too.

[MAJiC1]

Many thanks WA Wood but I tried that before (and tried again).  I removed all the Secure Boot protocols (option in Bios) and have even set it to factory default in Bios but it refuses to see anything but the original shipped WD mechanical HDD in Bios. it allowed m.2 to have windows 10 installed while the original Mechanical HDD was present, I have cloned the original hard drive to SSD via usb but once the original HDD is removed/swapped it will not boot and says no OS present. I've tried over a number of weeks and used Crucial, Samsung, Toshiba - SSDs, m.2 or Mechanical HDDs. My goal is boot = 250gb m.2 and data =Samsung mechanical HDD