If you could endow me with some of your most well- esteem wisdom, it would be so wonderful. It's like comparing apples to PC's. This problem can arise if the primary partition on the hard drive is not recognized by your operating system. You may need to run fdisk, put a new primary partition and format the hard drive to your specifications. It's a little bit of work but the effort will pay off.
Every good girl deserves a good hard drive with lots of RAM every once in a while.