A distributed system for storing digital data is disclosed. The distributed system includes a portable storage device suitable for being connected to a terminal, at least one storage server and a dispatching server. The dispatching server is suitable for retrieving accessibility information indicating that the at least one storage server is accessible by the portable storage device. The portable storage device is suitable for, when connected to the terminal, sending identification information to the dispatching server. The dispatching server is suitable for, upon reception of the identification information, using the identification information for retrieving the accessibility information and for sending the accessibility information to the portable storage device. The portable storage device is suitable for, upon reception of the accessibility information from the dispatching server, using the accessibility information for establishing a connection with the at least one storage server and for allowing the terminal to access it.