pi@raspberrypi:~ $ df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root        29G  4.3G   23G  16% /
devtmpfs        459M     0  459M   0% /dev
tmpfs           463M     0  463M   0% /dev/shm
tmpfs           463M  9.7M  454M   3% /run
tmpfs           5.0M  4.0K  5.0M   1% /run/lock
tmpfs           463M     0  463M   0% /sys/fs/cgroup
/dev/mmcblk0p1   63M   20M   43M  32% /boot
/dev/sda1        30G  100M   30G   1% /mnt/samba
tmpfs            93M  4.0K   93M   1% /run/user/1000

pi@raspberrypi:~ $ sudo parted /dev/sda1
GNU Parted 3.2
Using /dev/sda1
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
Model: Unknown (unknown)
Disk /dev/sda1: 32.0GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:

Number  Start  End     Size    File system  Flags
 1      0.00B  32.0GB  32.0GB  ntfs
 (parted) quit

pi@raspberrypi:~ $ sudo apt-get install -y ntfs-3g

pi@raspberrypi:~ $ sudo cp /etc/fstab /etc/fstab_BK

pi@raspberrypi:~ $ sudo vim /etc/fstab

/dev/sda1 /mnt/samba ntfs-3g defaults,noexec,umask=0000 0 0

proc            /proc           proc    defaults          0       0
/dev/mmcblk0p1  /boot           vfat    defaults          0       2
/dev/mmcblk0p2  /               ext4    defaults,noatime  0       1
/dev/sda1       /mnt/samba  ntfs-3g defaults,noexec,umask=0000 0 0
# a swapfile is not a swap partition, no line here
#   use  dphys-swapfile swap[on|off]  for that

pi@raspberrypi:~ $ sudo apt-get intall -y samba

pi@raspberrypi:~ $ cd /etc/samba

pi@raspberrypi:/etc/samba $ sudo cp smb.conf smb.conf_BK

pi@raspberrypi:/etc/samba $ vim smb.conf

[samba]
comment = samba
path = /mnt/samba
writeable = yes
create mode = 0664
directory mode = 0775

pi@raspberrypi:~ $ testparm

root@raspberry:~ # adduser samba

pi@raspberrypi:~ $ sudo pdbedit -a -u samba

pi@raspberrypi:~ $ sudo pdbedit -L

pi@raspberrypi:~ $ sudo /etc/init.d/smbd restart

root@raspberry:~ # usermod -aG sudo username