A hard disk drive tray module is disclosed. The system also includes a locking mechanism secured to the board through a second pivotable fitting at a first end and configured to rotate at a second end opposite the first end between a storage position extending parallel with the board and a work position extending perpendicular to the board. On the computer side, the request file is retrieved and a response file is sent back to the mobile device including the encrypted content and a rights object file. The message is analyzed to determine whether the content is static.