Question Ssd and hard drive problems

[Kiana123]

So I recently bought a new ssd for my computer. I have a SATA hard drive from before. When I boot up my computer on the hard drive without the ssd everything's fine, when I plug inn the ssd my hard drive no longer shows up in the boot menu on bios.

 

[SkyNetRising]

Please list full hardware specs of your pc.
Is the new SSD in M.2 form factor?

 

[USAFRet]

What drives, what motherboard?