I have a hard drive from a PS3 that I am trying to copy to a portable hard drive. I am trying to do this without deleting data from the portable hard drive. Does any one know of a program or a way to do this?
Try clonezilla, a live OS purpose-built for copying filesystems or raw devices (partition or full disk). You'll have to attach both disks at the same time (but you knew that), and you might want to detach any other drives from your system to avoid accidents. Clonezilla is free, runs on many architectures, and doesn't take long to download, so it should be a good fit for your scenario. http://clonezilla.org/