SAMBA Shares

Add the following to the bottom of the /etc/samba/smb.conf

[sharename]
comment = a comment
writable = yes or no
locking = no
path = /path/to/shared/folder
public = yes or no
valid users = username

Uncomment the line in the smb.conf:
security = user

You need to add an existing user to the sambashare group:
sudo usermod -g sambashare username

Create a samba password for the user - the -a is only needed the first time you set up a password for a new samba user:
sudo smbpasswd -a username

Restart SAMBA:
sudo smbd -D
sudo nmbd -D