Hello all, I received a 640GB internal hard drive for Christmas and I'm preparing to install it. I plan to use Carbon Copy Cloner to clone my Macintosh HD drive onto my spacious external drive (which also has my Time Machine Backup info on it) before installing the new drive. Will cloning the drive onto this external interfere with the data already on the external? If so, can anyone suggest a better way to go about doing something like this? Thanks!