Nowadays there’re many online data backup services on the web and usually these services are considered as safe, useful, and easy to store all data into the cloud and take them off when it’s necessary. But we must consider that these services are provided by somebody else. Even if you feel safe after you stored your data and information into the cloud as backup, you must realise that these data are not in your hands, these are in the cloud where you cannot reach sometimes. Services are provided by somebody else and if they suddenly close this service? On the internet, everything could be possible…