Owncloud is one of application sharing data and free editions also accompanied the business and Enterprise Edition, provides good security. Implementation of mobile syncing with the concept of onwcloud is required because the Exchange or sharing of data like images, video, and other files more accessible and practical. Then the confidentiality of data between employees, was more assured because owncloud-based. The research was carried out using the method of mobile syncing. Mobile syncing allows for storage of two or more versions of the same file, stored on your computer and on the network folder, identical to each other. These methods through the stages of implementation, configuration and data synchronization. From the application of the mind that this support owncloud software data storage both in the application that has been synchronized so owncloud owncloud can run in well and smoothly when used, such as in the form of a video, image, text to be accessible on the intranet or the internet. Keyword : Owncloud, Storage, Sistem Operasi, Open Source.