I just installed a Crucial M4 SSD and put everything from my old HDD to the SSD (about 100gbs on the 128gb SSD). I am wondering what i should do with the hard drive which has the same files as the SSD. I don't need the files on the hard drive because they copied onto the SSD. Can i simply delete all the files or do i need to back them up? Any help would be greatly appreciated.