The file sharing system is able to provide a client with a single logical directory and reproduce the single logical directory in a remote site when the local site has stopped in use of a remote copy that is made between the local site and remote site. The first site provides the client with a logical directory that is constituted across respective nodes in the first site. The remote copy is executed between the first and second sites, and the data of both sites are synchronized. For the generation of the logical directory and the management of the remote copy, a common management table is used, and the management table is held by all of the nodes. In cases where the first site stops due to a fault, the second site utilizes information related to the remote copy in the management table to construct the logical directory and reproduces the logical directory to the second site.