Okay so, I had a HDD with windows7, Then I bought a SSD and used macrium to copy everything on the SSD. Lately I've been Getting DISK usage 100% for no obvious reason so I decided to format while upgrading to win 10, still same problem. I will probably send back the corsair SSD for a replacement but in the mean time I want to use my old HDD that still has Windows7, how do I proceed?