When it comes to backing up data, there are only 2 groups of people
involved. The first group are people who have lost data, like those who have had hard-drives die on
them, or were exposed to the Virus that Ate The Internet. The second covers those who haven't had the pleasure of that
particular experience. Yet.
But it's only a matter of time, statistically speaking. And you can never predict when, or how it will happen. Brand new drives die a few days out of the box, while older ones faithfully chug on on for years. You bed down for the night, as your laptops purrs on, worry-free. The next morning a howl of disbelief shatters the early morning silence of the dormitory. "I didn't
DO anything!"
"Are you sure, dude?"
"
YES!"
"Uh, download anything new last night?"
"Nuh--oh?" Then, "Oh,
crap."
The drive can't be detected. The laptop falls due to your cat's panicked antics, and you can't get it to boot. Your sippy cup wasn't fastened as tightly as you thought it was. Viruses, trojans, hackers
and theft. Lightning strike, fire, water from a leaky pipe...
you just don't know.
Thus, back-up. There's something you need to understand about back-up, though:
Back-up is not a guarantee, unless and until you test it (data verification) and
even then, stuff happens.
Back up is insurance, and as with any kind of insurance, back up comes in handy
after a loss of some sort. See the difference now? And as with any kind of insurance, you need a plan that suits your needs.