[SOLVED] m.2 ssd on a pci adapter to motherboard. Will it always be the first drive that the pc will boot from?

[OneTrickPony_B]

Hello,

I had an ssd on a pci adapter as my first and only boot drive. I got a strange error while running Windows 10 and then it eventually was not accessible trying to do a fresh Windows10 install from a usb stick. And I reinstalled to the HDD that originally came with the computer. So now I am wondering," can I use the SSD as an internal storage drive that doesn't boot?(once i get the SSD working)"

Thanks for reading and possibly responding.

 

[USAFRet]

No.
What is in the BIOS boot order determines what you boot from.

What motherboard is this?
What are ALL the storage devices involved here?