| 摘要 |
PROBLEM TO BE SOLVED: To provide service as if a storage service user(SSU) has an infinite storage area by performing control so that free capacity of a storage device directly connected with the SSU always exists regarding a storage service system, the SSU and a storage service provider(SSP). SOLUTION: In this storage service method of the storage service system to perform data transfer between the SSU to use data and the SSP to provide storage service, it is constituted so that the data free area is always provided to the SSU by automatically performing upload and download of the data between the SSP and the SSU so that no free capacity of a data storage part (DAS) of the SSU becomes less than a specified value.
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