I have an old system (dell optiplex 3010) as a little budget gaming pc until I can upgrade to something better, I just now plugged in my old laptop hard drive (2.5 inch drive) and it shows up in the bios, yet when i boot into windows 10 and try to format it, nothing shows up in disk management. Some things to note, it came from a Lenovo laptop. I'm not sure if that has anything to do with it, and also it already has a copy of windows 10 on it.