Is this M.2 storage on this motherboard an M key or M+B key?
https://pcpartpicker.com/product/Fk7v6h/asus-prime-b450-plus-atx-am4-motherboard-prime-b450-plus
https://pcpartpicker.com/product/Fk7v6h/asus-prime-b450-plus-atx-am4-motherboard-prime-b450-plus