+.BR \-s ", " \-\-sector\-size =\fIsize\fR
+Specifies the sector size of the exFAT file system.
+The \fIsize\fR argument is specified in bytes or may be specified with
+\fBk\fR/\fBK\fR suffix for kibibytes and must either 512, 1024, 2048 or 4096
+bytes.
+The default value is the sector size reported by the device, or 512 bytes if the
+device sector size cannot be determined.
+.TP