I could use a pointer on fixing the fstab problem to restore earlier working order. I dont have owner in mnt directory and its all snafu. Thank you very much.
I tried changing the mount point of a external HDD. Failed. This is the end.
mount /dev/sdc mount: /dev/sdc: can't find in /etc/fstab.
When mounting it with Disks this appears:
Error mounting filesystem Error mounting system-managed device /dev/sdc1: unknown filesystem type 'nosuid,nodev,nofail,noauto,x-gvfs-show' (udisks-error-quark, 0)
Editing mount options in Disks this appears:
Error removing old /etc/fstab entry Didn't find entry to remove (udisks-error-quark, 0)
Thank you again.