I installed my SSD today in my extra SSD slot and it's not being recognized by windows/bios, I plugged the SSD many times, and checked bios but my bios look different from others. I need help and ill provide any information you need.
try to install the new ssd in the first ssd slot and the original ssd place in the extra slot. If it's still not recognised update the bios to latest version. Otherwise it may be a faulty ssd.