A computer system and its control method capable of allocating resources to a plurality of users in a balanced manner and ensuring information security between the users even when the plurality of users are made to extensively manage a storage system are provided. The system includes an expansion card receiving means, a driver storing means, a computer connecting means, a network connecting means and a driver manager. A network includes a server programmed with a database of location information, a database of user information, payment account information, and a wireless communication system capable of communicating with the user’s mobile device. The conductors are woven with the loading fibers so that when the loading fibers are placed in tension, a normal contact force is exerted at each of the contact points of the conductors. This is effective in saving of the number of additional fertilization or nitrogen components left in soil after the period of culture. Recipients not receiving the at least L data packets send a reply to the sender.