Config My new WD M2 SSD

I bought WD M2 blue 500 GB >>> I add it to my new laptop Dell Letitude 3590 … I want to install Windows 7 in my new WD SSD M2 HD without losing my builtin Windows 10 on my laptop HD
I failed to do that
Thank you a lot
Ramy Magdy
+2 0100 877 4677