New hard drive won't show full capacity after restore?

I'm running True Image Home 10 on Windows XP home. I just did a restore to a new 500gb hard drive, yet it only shows a total capacity of 80gb after the restore. 80gb was the size of my old hard drive and the restore image file was about 39 gb. It boots just fine and everything, but where's my extra storage? I know my BIOS can support drives that large because I have an identical second 500gb drive and it shows full capacity.