Backup in digital photography is so easy and protects your images so well that you should be backing up your images right from the start. Whenever you read news stories about people displaced by a natural disaster, you always read how people saved their photo albums. If you back up your digital files, you also have a convenient way of taking your images with you when disaster strikes, too.
Backup is much more than disaster preparedness, however. Digital files are very vulnerable to hard
drive failure. If your photos were on a drive when it failed, your photos are lost forever. There is a saying in the computer industry that it is not if your hard drive will fail, but when.
Backing up your photos onto accessory hard drives that plug in to your computer is very easy. These have come down so much in price that many photographers back up their pictures on more than one for added protection.