Hello, I am going to be building a new PC but I am in a bit of a dilemma. I have an internal HDD from my old PC that I could possibly use in the new build. This would save me the headache of installing all my games and mods individually. I also have a new internal HDD that I bought to go in the new PC. I also have an old external HDD that I have been using for a year or so if that is vital info. I have a few questions. I only have one SATA cable for the time being, so should I install the old HDD in the new PC now and wait to install the clean HDD? If so, should I go ahead and install Windows 8.1 to that old HDD after I install it to the new PC? Also, if I am going to be using the old HDD in the new PC with a new OS, are there any problems or things that I should be aware of? Thank you for your help.
Edit: The old HDD has Windows 7 on it. Forgot to mention that.
Edit: The old HDD has Windows 7 on it. Forgot to mention that.