Cloud computing means a type of internet based computing. Cloud computing used a network of remote server hosted on the internet to store and manage data rather than a local server or an own computer. Cloud storage that refers to online space that the users can use to store data. It provides a secure way of remotely storing their important data. Cloud storage is gaining popularity due to its elasticity and low maintenance cost. In case data have been accidently corrupted or misplaced. In previously day they used Proof Of Retrivebility (POR) and Proof of Data Possession (PDP) for repair the corrupted data and restore the unique data.