Hello, I just sold my eMac and Upgraded to an iMac that has a 250GB hard drive. I have an external 120 firewire as well. I would like to have some advice on how to have the best back up set up. Previously, having the eMac, there was no problem backing up the entire hard drive because it was smaller than my whole external, but now its the other way around. I just started reading some information about RAID. Would you suggest for a regular uses to use RAID or just some back up program. Am I able to partition the 250 drive on the iMac without loosing anything to make one RAID so each has 125? Is it possible to just back up certain sections with RAID having an external 120? Thanks for your help.