Quote from the article:
“One of the most important rules to learn when using a computer, and especially when storing data on a computer, is to always keep backups. This may sound paranoid, but occasions can happen when you lose lots of work, photos and documents, and the user is the only person to blame.
Backing up your data can protect you from the worst, in the event that your hard disk fails or files are accidentally erased. Windows XP includes a few handy tools that allow you to back up data with a few clicks of the mouse, but it is also very easy (and sometimes advisable) to backup your data manually.