I have a 1tb HDD right now in my OptiPlex. I just bought a new SSD(120gb). I want to use the new SSD as a boot drive for quicker load times, I also bought a USB to SATA cable to help me do this. I googled how big "windows" is, and got a 20gb total answer. Is this true?. Can I just plug in the new SSD, and copy all the files over from the old HDD, then swap the hard drives( I want to just us the SSD).