Question When I Plug M.2 SSD, Every other HDD/SSD are no longer detected

Apr 13, 2019
Hi, so I just received my new SSD 960 EVO 250GB, I plugged it on the motherboard (Asus Prime 450 plus) and when I try to boot the PC with the SSD plugged, every other SSD/HDD are no longer detected, same with an USB key. It only detect the SSD but because he is new, there isn't Windows and so when i boot it it say "Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key".

I don't think that was a good idea but i tried to plug it when my computer was running, it made my entire computer crash, could just move the mouse but nothing else was working. I also tried to boot my computer on a USB with Windows Installer and plug the SSD when I was on the menu where I have to choose on which drive I want to install windows, when I plugged it, I actualized and every other partition had disappeared

I tryed to update my bios, i looked for drivers but I couldn't find anything.
I hope you guys can help me. Sorry for my bad English.