So I am currently building a new system and have a 500gb 970 evo m.2 which i am going to fresh install windows on along with a new 1tb 860 evo ssd. In my old system I have a 500gb 850 evo which has windows installed and a 1tb wd mechanical drive. I want to move the 2 drives from the old system to the new one while retaining the files on both drives. How do i do this with windows installed on technically 2 drives when i plug them into the new system? I was thinking about just moving my files from both that i need onto and external drive then wiping both but was wondering if there is an easier way i can just plug them in.