Replication data acquired by a copy and a volume storing therein this replication data are flexibly managed in response to the needs of a user depending on the attributes of a file which becomes the target of the copy executed by a storage apparatus. More concretely, when receiving an instruction of the backup for a file to be the backup target, if there has been received a specification about the attributes of the backup target, or a method of managing replication data acquired by the backup of this backup target, the specified attributes and the like are managed in a manner of being made to correspond to the replication data and a volume name into which this replication data should be stored.