I've gone back to old-school Robocopy for my own backups for my 100GB of photos, 80 GB movies, and 40 GB other files.
I use an old BATCH file with a robo-copy string that when executed will pull data from the target-path and push it to the destination path. With the right flags you can make it update only "new" files thus speeding it up as it wont re-copy data that hasn't changed. The best part is that because its standard windows file-system and your current file-structure you never have to worry about your backup software becoming obsolete or having problems restoring data.
Robocopy command instructions can be found here... http://ss64.com/nt/robocopy.html
For each directory tree just make a new-line in the batch file then run the whole thing as a scheduled task.
If your interested I can go dig-up one of the strings and post it here.
As for an MS Office alternative I would have to put my vote towards Open-Office as its the most mature and feature rich of the free solutions.
Peace out
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