ArondenOuden

@paddy-stone Yeah, but I didn't know it wasn't a NVME SSD

@paddy-stone, Thank you SO much! It worked, I couldn't find anywhere!

@paddy-stone

I used the 'ultra m.2 slot', so the top one Should I use the other one?

I bought a new m.2 ssd (WD BLUE 3D NAND SATA SSD M.2 2280, 500GB). I installed it into my pc, unplugged the existing SSD and HDD, and went to the UEFI. I plugged in my usb flash drive, which I used the first time. But now the usb flash drive is working, but my m.2 SSD isn't detected. Specs: Asrock fatal1ty b450 gaming k4 (motherboard) AMD Ryzen 5 1600X (CPU) EVGA GTX 1050 ti (GPU) Sandisk usb 3.0 16GB WD Blue 500GB - [WDS500G2B0B] M.2 SSD