I have bought a brand new HP Pro 3330 Microtower model recently. I had ordered it with 500GB hard disk and it had come with Windows 8 Pro OS. OS was installed in the C drive having all the space (465GB) available. I would like to have another disk as I don't want to save my data in the same drive in which Windows is installed. When I'm shrinking the data, around 357GB, from the C drive, it is then turning out to be an Unallocated Space. But I'm not able to convert this unallocated space to a new drive. I'm getting the error message that there is not enough space in the drive(s). I've attached the screenshot of the disk management. Even if I'm trying to extend the volume of any of the drives other than the C, i'm not able to. Kindly put in your valuable suggestions.