Automatic back up is a desired feature in an online storage service. Some companies include a pop up message that alerts that user of the continuing back up activity. But some storage providers also allow the option to disable this feature since some people are annoyed by pop up messages appearing on their screen. There are also providers that allow automatic back up on itself and save important files for you on the background. In case the process of backing up your files is interrupted, it will automatically resume if the internet connection is available again.
You can also find providers that allow clients to request that their files and data be backed up in an external storage device. There is also an option for a back up software to be on an attached device and you can just remove without restarting the entire back up process or if you get disconnected from the web.
Storage companies also ensure that your files and data are fully backed up once they reached their destination. Back ups are sent to more than one destination at one time to ensure that no data is lost and that you can retrieve them anytime. General backups in a local server basically happen before it is backed up in a remote destination.