As we often say in IT, all computer users can be divided into two groups. The first group consists of those who archive data, since they have once lost it. The second includes users who do not backup their data yet, because serious data loss is still ahead of them.
This little humorous saying is confirmed by experience of many IT administrators and regular users. Many of us start to think about the safety of our data once we lose it. Meanwhile, backups are one of the best, cheapest and surest ways to protect critical data from loss.