Online data back-up remote service is well understood from the name itself. Online backup service is almost similar to traditional back-up software. Any important data can be transmitted over Internet and securely store them on a server that is in a professional data centre instead of the usual CD’s, DVD’s, back-up tapes, etc. One of the important features of back-up service is that data is transferred over a networked connection to an ideal remote location. In the case of traditional back-up system one has to manually take the back-up media fully off-site. In online back-up system one does not have to keep changing tapes or CD’s or other manual steps, it is fully automated and has unlimited data retention. This software works continuously and whenever there is a change in the data it is updated automatically in the software. Below are listed some features of a good back-up service: