Question I can't use 2 SSD in my Laptop, I don't know what's the problem

[KriosX]

Hi, it's my laptop,
https://www.msi.com/Laptop/GE73-Raider-RGB-8RF/Specification
I bought this SSD,
https://www.crucial.com/products/ssd/crucial-p5-ssd
My laptop came with "128GB PCIe SSD" it could be missing I don't know, got info from seller's website
website : https://www.hepsiburada.com/msi-ge7...-3-fhd-tasinabilir-bilgisayar-pm-HB00000BPGMK

also, Crucial P5 has 1 notch
internal SSD(Kingston 128 gb PCIe) has 2 notch

The problem is, when I plug both SSD my computer doesn't boot operating system and it only shows in bios my 500GB SSD,(it opens directly bios)
when I plug off 500GB SSD it works well

also I updated my BIOS from msi global website to the latest BIOS. S till doesn't work.

 

[rgd1101]

no option to change the boot seq in bios to boot from the 128gb?

 

[KriosX]

no option to change the boot seq in bios to boot from the 128gb?

it doesn't even read