Im building a new computer with an 128 GB SSD that I plan on putting a copy of Windows 7 on, and I'll be using a old 1TB HDD with a different copy of windows 7 on it for all of my games. Is there any way I can completely remove the files off the HDD to make it like a factory new one? I do not want any files from that HDD to transfer over at all, should i just buy a completely new one to save time and hassle?