There are a number of ways files can be lost unexpectedly…
Computer crashes – always happens when you least expect it, and can lead to data loss.
Virus Infection – aggressive malicious viruses can corrupt or encrypt files and disable computers.
Hard drive failure – hard drives have a finite lifetime and can fail suddenly without warning. The sudden death of a hard drive can cause the painful loss of months or years of irreplaceable files.
Physical computer damage – your files are more at risk if you use a laptop. Light and portable comes at the price of reduced durability. Laptops are sensitive and are easily damaged if dropped or have drinks spilled over them.
Theft – computers are sought after by thieves and cannot always be kept secure whilst travelling.
The bottom line is that if you value what’s kept on your computer, it’s wise to take steps to protect your information from sudden loss. Work can be redone, but the loss of client data built up over the years is irreplaceable.