So I was able to solve this issue by removing the HD with the Windows OS, then install Debian on the second HD. When first booting up, I entered into BIOS and select the drive new installed Debian HD. I successfully booted up Debian then I shut down.
I put the Windows OS HD back in my labptop then booted to either disk using the F7 key (shows boot menu).
I don't know if Grub just fails to write the the chosen HD during the install or a hardware feature prevents installing Grub on the HD when an OS (MS Windows) exist.
I cannot get my BIOS menu to display 2 or more boot drives. The menus settings only show 1 disk with the other disk option showing (BBS Boot is disabled) <--I think that's the wording off the top of my head. This BIOS on my laptop is circa 2011-2013 where most hardware was just transitioning to UEFI.