exfatlabel man page
exfatlabel — get or set an exFAT file system label
exfatlabel [ -V ] device [ label ]
exfatlabel reads or changes an exFAT file system label (volume name).
If label argument is present, exfatlabel sets the new volume name. Label can be up to 15 characters. This limit is shorter if characters beyond Unicode BMP are used because internally label is stored in UTF-16.
If label argument is omitted, exfatlabel just prints current volume name.
Command Line Options
Command line options available:
Print version and copyright.
Zero is returned on success. Any other code means an error.