In cloud computing, data security is the major issue. Security in single cloud is less popular than in multicloud due to its ability to reduce security risks. In this paper, the authors describe a new architecture for security of data storage in multicloud. They use two mechanisms-data encryption and file splitting. When user uploads a file, it is encrypted using AES encryption algorithm. Then that encrypted file is divided into equal parts according to the number of clouds and stored into multicloud. This proposed system enhances the data security in multicloud.