Data sharing is an important functionality in cloud storage. In this Project, we show how student can securely keep his data, efficiently, and flexibly share data with others students in cloud storage. Cloud storage is just an additional feature to the student portal where is the student normally login to get his/her need We provide an overview of information dispersal strategies to realize reliable distributed cloud storage systems and provide an overview of state-of-the-art cloud storage approaches. Then, we analyze them with respect to security properties. Furthermore, we discuss the lack of privacy features and in particular features to provide access privacy in existing distributed cloud storage systems, which is an important direction for future research on distributed cloud storage.