Are your backups working? How do you know? When was the last time you tried to recover data from a backup?
We encounter customers on a daily basis with computer problems severe enough that we need to reload their computer to get them back up and running. Of course the first questions we ask are: "Do you have a current backup?" and "Do you have all of the original software what you have installed on your computer?" In most cases, we get the "deer in the head lights" look.
Approximately 30% of businesses that have a major fire are out of business within one year. 70% fail within five years. (Home Office Computing Magazine) Could your business survive a significant data loss? How much would it "cost" you to recover and/or recreate your data?
Backup to whatever medium is affordable for you... external hard drives, flash drives, on-line backups, another computer. JUST DO IT!