Fortunately backing up (only) your data is a snip with EZbackitup a freebie click here
Like making a CD, you choose what you want to backup and where to save it.
This can take a few minutes but your customising can be altered any time.
Then it may take a minute or so to run for the first time, but after that running will take only a second or even less.
You can configure so that it will only overwrite changes to the data.
No excuse left not to backup at least once /day