If you want to do this on a regular basis then consider a mini p2p(peer to peer) network. If however this is just a once off thing then take the hard drive from your old machine and set the jumper to slave. The jumper is a plastic clip at the end where all the connections are on the hard drive. Unplug your power cable for your new machine and plug in the hard drive to the ide cable which comes from the NEW HARD DRIVE. There is usually an extra socket for this purpose.Then connect the power lead to your old hard drive. Power up your machine and the old HD shuold be seen as d drive. If you decide to use this option do not under any circumstances format the old hd until you have extracted your data.