Patent ID: 8190573

Claim:
A file storage service system comprising, a path denotative NAS server which is an NAS server to perform a reception of a file denotation from a client based on a file deposit location, an ID denotative NAS server which is an NAS server to perform the reception of the file denotation from the client based on a file identifier, a file management device, and a user terminal, wherein said file management device comprises, a path denotative NAS access unit which sends a read request with the file deposit location to said path denotative NAS server, and reads a file from said path denotative NAS server, a file identifier generating unit which generates the file identifier of the file obtained by said path denotative NAS server, a file identifier registration requesting unit which sends a file identifier registration request with the file deposit location of the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit, and registers the file identifier in said ID denotative NAS server in association with the file deposit location, a file identifier storing unit which stores information relating to the file obtained by said path denotative NAS access unit and the file identifier of the file generated by said file identifier generating unit in such a manner as the information and the file identifier being associated with each other, and a client request receptor unit which transmits to the client, at a request from the client, the file identifier stored in the file identifier storing unit and information where the identifier and the file deposition location are corresponding to each other, wherein when the file deposit location corresponding to the file identifier received with the read request from the client exists within said ID denotative NAS server, said ID denotative NAS server reads a file stored in the file deposit location and transmits the file to the client, wherein, when the file deposit location corresponding to the file identifier received with the read request from the client exists within said path denotative NAS server, said ID denotative NAS server sends the read request with the file deposit location to said path denotative NAS server, reads a file from said path denotative NAS server, and sends the file to the client, and wherein said user terminal comprises a file information display unit which displays on a display device a directory structure within the path denotative NAS server and which displays attribute information of a file selected from the directory structure.