The one clear advantage that online backup has over local backup is that your data is stored away from home or office, meaning that your important data is free from local disasters like fires and floods that could impact your external hard drive, optical discs, or other local backup destinations or media.
With an external hard disk you can backup your files to a separate hard disk. While backup through an external hard disk can be faster and more straightforward, online backup has some advantages. First, external hard drives are prone to stop working at one point when that happens, the stored information can be entirely lost. By contrast, online backup is made on multiple hard drives, significantly reducing the risks. Second, it’s easy to lose or have your external hard disk stolen. This is unlikely to happen if you use online backup, since your files are kept in data centers guarded by security personnel.
