samba - Dec 2019 - mounting ext usb drive

Hi, trying to mount on demand, external USB drive which is /bkup.
/etc/fstab has it as:
?UUID=4C76D06176D04CF8 /bkup?????? ntfs-3g?? noauto,user,rw??? 0?????? 0
The following does open a share but its not really /bkup and its not
writeable. Corrections are welcome.
Thanks.

[backup_drive]
??????? preexec = /bin/mount /bkup
??????? comment = Backup Drive
??????? path = /bkup
??????? writable = yes
??????? postexec = /bin/umount /bkup
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