I am currently doing the B?U thing using progs. Currently on Acronis Home. I don't think the trial will be purchased...I find it slow in the GUI and several annoying things like unable to turn off the constant b/u feature.
I tried Paragon Free as I read a Sound on Sound article about it. The ability to just back up changes after a full one was attractive. Indeed it does do 'differential' b/u. But it seems to want to do a full one each time. Tested the rescue disc and it worked, well got to the point where it offered to install over anyway.
Used Macruim Reflect before that but changed as I wanted a prog that would do 'differential' back up.
So now I am thinking of just going back to a manual back up as I have a 240Gb drive with XP O/S on and two 500Gb drives. I basically mirrored them. And just having a full back up once a month on the O/S or after any major changes using Paragon. Macruim wanted to do the WIN P/E thing.
Then my data is generally safe and I don'y have to spend 10 hours getting the O/S back to how it was after reinstalling.
It seems you to have to spend a LOT of money to get a reliable, bug free B/U prog. I am disappointed with Acronis thats for sure.