The problem that I'm having is that my HDD is 500GB and the data occupying it is 400GB+ and my new SSD is only 120GB in size. How do I move my OS from my old HDD to my new SSD without any data loss? I'm planning on using the SSD just for my OS while my HDD will be used for storage. And I can't backup my files since I don't have an external hard drive that is big enough to be used to backup my data. Is there a way for me to JUST move the OS and not wipe the data from my old HDD?