I just installed a new Seagate Baracuda 500GB Sata drive in my computer. I used the Sea Tools software & cloned all the data & operating system from the old drive which is a 320GB Baracuda. After cloning the drive I set the BIOS to boot from the new drive & that went fine. However, now the new drive is showing only 320GB instead of 500. How do I get access to the rest of the 180GB on my drive?