I don't have the old HDD to hand, but I think it was either a 40 or 80Gb drive. I recall that Win XP was unable to recognise drives bigger than 137Gb at one point so I wonder if similar problems exist here?
Windows XP prior to SP1 had a disk size limit of 128GB. SP1 (with NTFS partitions) lifted the limit into the terabyte range (depending on the cluster size).
This 128GB limit was partly connected to the BIOS int13H / LBA addressing that limited disks to 128GB, together with the ATA 137GB limit which was "overcome" 10 years ago so your PC must be very old indeed! I still have a few PCs that have such a limit, and they are Y2K vintage.
SD