Hello I have a 1tb HDD that I installed windows and about 500gb worth of games and apps on before i switched out the motherboard and installed windows 8.1 on my new SSD forgetting to wipe the old data on the HDD before i moved it to the new PC. Now I am stuck with only half of my gb space, I would like to fix this problem without completely wiping the drive if possible because i fear it will mess up my PC in some way.