The mobile cloud storage application becomes more ubiquities recently for storing data such as image, audio, text files and etc. The most important issue in this regard is security of these tools and using the best method for encrypting the users' data for keeping them protected. In this study, we examine ten mobile cloud storage applications namely 4Shared, One Drive, Mega, Surdoc, Cubby, ADrive, Safe Sync, Team Drive, Wuala and Just Cloud. In these applications, we analyze the intercepted communications to determine encryption of the captured text and voice communication to bring out the results to find out the best cloud application that follows the encryption methods mostly. Thus, we use a histogram to analysis the text file and use a Wire shark to check whether a plaintext has been found in the cloud storage application or not, after that we analyze the plain text.