Example /etc/samba/smb.conf file:

[global]

   workgroup = WORKGROUP

# This will prevent nmbd to search for NetBIOS names through DNS.
   dns proxy = no

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Cap the size of the individual log files (in KiB).
   max log size = 1000

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d

    security=user
    follow symlinks = yes
    wide links = no
    unix extensions = no
    load printers = no
    printing = bsd
    printcap name = /dev/null
    disable spoolss = yes
    log level = 1
    map to guest = bad user

[data]
    path = /data
    available = yes
    valid users = pi
    read only = no
    browsable = yes
    force user = debian-deluged
    force group = debian-deluged
    create mask = 664
    force create mode = 664
    directory mask = 0775
    force directory mode = 0775
    comment = Data Directory
    veto files = /._*/.DS_Store/

Test config:

testparm

Restart:

sudo systemctl restart smbd.service