Wd smartware?

i am new to this external backup and am com pu ter illerit ive been able to back up presario  c but not sure how to back up presario rpd? drive can any one help this poor stupid soul

Could some kind person help me. I have a desktop running XP Pro and wish to transfer the whole C: to it from my wife’s Vostro laptop, which runs on Vista Home. I have today purchased WDElements external 320/GB drive and I can’t figure out how to transfer the hard drive onto it. from the laptop. The situation is complicated by the fact that  I cannot connect the laptop to the internet. Thanks in anticipation.