Question Problem with my BIOS SATA detection

[Juanxpeke]

I had an SSHD installed on my computer, but it goes too slow, so I decided to install a M2 SSD in the motherboard, well, it turns out that my BIOS doesn't detect de SATA connection of the SSHD (with windows installed) and neither the M2 in the motherboard, I need help :c

 

[rgd1101]

full system spec?
return it and get a 2.5" ssd?

 

[Juanxpeke]

full system spec?
return it and get a 2.5" ssd?

I have a Z390 AORUS Elite motherboard, AORUS RGB M.2 NVMe SSD 512GB, and Seagate 1TB Firecuda, Intel Core i5 8600K with 16gb ram, when I turn on the pc the RGB of the M2 turns on but as I said before, the BIOS doesn't detect it or the Seagate Firecuda.