Before I upgraded to Vista, I just backed up the "My Documents" folder because it contained all the documents, "My Pictures," music, downloads, etc., etc., but Vista has all these folders separate instead of under "My Documents." So, more recently I've been backing up my entire user name, which is more than I need, but covers everything. The problem arises today when in my attempt to backup everything under my user name, when there is already a previous backup of that file on my external HD, and I find I don't have the space for both. I would think there would be a way to just overwrite the old with the newer version, but it's not giving me that option. It says it will "merge" the two files, and ask me each time what I want to do with files with the same name on each drive. Then when I start, it still says there isn't enough room. There is enough room for one or the other, but clearly the system doesn't understand that.
So -- before my computer crashes, what folders should I backup to save as much data as possible?