Originally Posted by **********

If you're using a Mac, you can purchase a Time Capsule. It's a Combo Wireless Router with 4 Ethernet Ports and 1,2 or 4TB Hard disk built in. It runs with Time Capsule software included with your Mac already and backs up your HD in the background. First it does a full backup and then a partial backup every every day. Then if you need to do a restore, you can restore your computer to the way it was on any exact date you want.

It works well! Just set it and forget it.

If you want something faster, you can use an external hard disk on USB, Thunderport or Firewire, by Promise Technologies any of a dozen others.