At first see where ntfs partition is located.

lsblk | grep ntfs

Then make a mount point

sudo mkdir -p /media/bsddata

And add the mount point to the /etc/fstab file.

## ntfs partition /dev/ada0s3
/dev/ada0s3 /media/bsddata ntfs mountprog=/usr/local/bin/ntfs-3g,rw,late 0 0

Reboot after editing.