|You don't need 80GB if the partition is only going to be for the OS itself. If you want to start over I suggest you partition the 80GB into say 30GB & 50GB. Install only your OS and a couple of core programs on the C partition. |
Install all remaining programs on the D partition.
Now connect the 1TB and partition it to say 100GB, 200GB with the remainder in a 2rd partition.
After WinXP is installed and fully updated and all your programs are installed I suggest you image the C partition to the 100GB on the second drive. Then image the program partition to the second partition on the second drive.
Now, if the need arises to restore the OS you can do that without re-installing any of the programs. They will all work if the image from the second drive is restored back to the C partition. Same goes for the program partition on the 80GB.
This will give you a comfortable level of protection for the OS & program.
You should also maintain at least two copies of your personal files. I recommend burning them to optical disk (DVDR or CDR). For convenience you can also maintain a copy of them on the second drive and/or the external. The more important the files the more precautions you take.
Once files like photos are burned to optical disk it is very easy and cheap to make multiple copies. Photos especially, are irreplaceable and should be handled as such. Off site storage of the optical copies is a good idea. Safety deposit boxes are a good place. You need one larger than the smallest available size though.