PROBLEM TO BE SOLVED: To provide a storage capacity management system that can store data to a mobile communication terminal independently of a free capacity of the mobile communication terminal by securing a free capacity capable of storing a huge amount of data when the capacity of the mobile communication terminal to acquire a huge amount of data is deficient.;SOLUTION: An Internet service management server 3 is provided with a data management means 6 for transferring stored data in the mobile communication terminal 1 to a data storage means 7 of the Internet service management server 3. The data management means 6 compares and discriminates a capacity of acquired data acquired from the Internet 4 on an acquisition request from the mobile communication terminal 1 with a storable capacity of the mobile communication terminal 1, and allows the mobile communication terminal 1 to transfer the stored data to the data storage means 7 of the Internet service management server 3 to ensure the capacity whereby the mobile communication terminal 1 can store the acquired data.;COPYRIGHT: (C)2004,JPO
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