Mobile devices are widely deployed in the world, and many people use them to download and upload media such as videos and pictures. Traditional security approaches were proposed to secure the data exchange between users and the cloud. Information hiding techniques have been recently emerged in many different application areas. In a digital image watermarking system, watermark is embedded in an object and the object may be an image or audio or video. Image object have been used in this paper. But nowadays, files are uploaded and maintained in cloud servers, where malicious users access these watermarked images from cloud servers and remove the watermarks from the images and make use of them without any copyright from the data owner. To overcome this problem, this paper introduces the new method of image chunk. Image chunk will split the image into four parts of sections and upload them in a four different sections to the cloud server respectively. Therefore, users cannot access the image and also cannot remove the watermarks from the file. Also, the authors have proposed a file compression technique to optimize the memory size and quality for storage space in the server. It will reduce the bandwidth usage for file upload and downloads.