Cloud storage is method in which data is being store on remote location and access it through internet. The purpose of cloud storage is to put the data on safe place and can be accessible at the any part of the world. It is becoming most popular way to save the data. According to statistic there are 1600 million equals to 1.6 billion cloud storage users worldwide, generating 4 billion USD revenue. The 85% of total data being transferred through mobile.