Problem with backing up 400GB of datas using MS 2003

Hello There,
I am much in love using the MS 2003 than the MS 2007 maybe just because I am more well verse to it.
For that, I was going to install something on MS 2003, I was going to install this on a MS 2003 in the server which has 400GB worth of data, and I would want or like previous version etc. as well and will allocate a 2TB drive for this.
So the question would be like this…. Has anyone here used the product before, or used the product to backup that much data?
And my real concerned and I want to know is all about stability etc. so any feedback from you guys would be great and helpful for me.
thanks in advance.
