My computer recently crashed, I tried everything I could think of to fix it, but I was afraid of losing the programs and the information on the hard drive, (WD SATA 320 GB). So I purchased a new hd, (HITACHI SATA 2 TB), I installed it and tried to re-install the os, but I couldn't. I purchased a new copy, full version of Windows xp pro sp3, (NTFS filing system). I formated the new hd, installed the windows xp pro. But windows expl. showed the new hard drive as 80 GB. I put the orig hd back in the second slot, (all of the information was intact), windows expl showed that hd as having the correct volume 320 GB. I went to device manager, and looked at the properties of the new hd, I populated the volume and it showed the available volume as the full 2 TB, but on the bottom it showed (partition c) as having only 80GB, and windows expl still said 80 GB. I ran chckdsk and it didn't make any difference. How can I change the volume in windows expl?