I had forgotten how important having data backup is until my desktop PC crashed on Friday. My PC was running and someone in the house had accidentally turned off the switch. When I restarted my PC, it was ‘hang’. The order details of my customers’ orders and their delivery details were all stored in the hard disk of the PC and I was unable to retrieve them. Consequently, I have been unable to send out my customers’ order. My PC is now ‘admitted’ and the specialist is still unable to diagnose the problem. This incident has taught me a costly lesson and I have since been doing a daily backup of my files.