Most mysqlbackup operations, including those
        on single-file backups, write data or metadata to a designated
        directory referred to as the
        “backup
        directory” in this manual. See the description for
        --backup-dir for details on its
        usage for different operations.
      
        Choose in advance for this directory a location on a file system
        with sufficient storage; it could even be remotely mounted from
        a different server. You specify the path to this directory with
        the --backup-dir option for many
        mysqlbackup commands.
      
        If you use the backup directory as a location to store your
        backups, it is preferable to keep each backup within a
        timestamped subdirectory underneath the main backup directory.
        To make mysqlbackup create these
        subdirectories automatically, specify the
        --with-timestamp option each time
        you run mysqlbackup.