Three or more file storage apparatuses and a management computer coupled thereto construct a file storage system. The management computer stores therein migration path management information, which indicates a configuration of a migration path capable of including three or more file storage units arranged in a cascade form, and path history information, which indicates a change history of the configuration of the migration path. Each time when the configuration of the migration path is changed, the management computer updates the migration path management information to information that indicates the changed configuration of the migration path, and adds the information that indicates the changed configuration of the migration path, to the path history information.