Online backup, cloud backup or off-site backup are all similar terms that refer to backing up your computer file to a location different than your home. Most of us understand how important backing up our digital photos is, but why do we need more than a simple external hard drive? What is all the fuss about backing up our computers in the “cloud”? And how do you choose a great online backup service. Read on about 3 essential features of a great online backup service.