It's a program to mirror files from a folder or disc to another, kinda like a software Raid 1. I like it because you still have the two separate drives in your control panel, and it just seems more convenient than setting up a Raid 1, since I'm using XP home (no software raid) and that I use firewire external hard drives.

Here's a link to the software

http://www.techsoftpl.com/backup/index.htm

I'd really like a freeware or open source equivalent as I don't have the money to buy it for 45$.

Thank you very much!