Estou no Windows10 e estamos usando a seguinte configuração de trabalho do samba
[global]
workgroup = WORKGROUP
server string = %h server (Samba, Ubuntu)
netbios name = FileServer
wins support = yes
dns proxy = no
name resolve order = lmhots host wins bcast
interfaces = 192.168.0.1/24 eth0
bind interfaces only = yes
log file = /var/log/samba/log.%m
max log size = 1000
syslog = 0
panic action = /usr/share/samba/panic-action %d
server role = standalone server
passdb backend = tdbsam
obey pam restrictions = yes
unix password sync = yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
pam password change = yes
map to guest = bad user
usershare allow guests = yes
[printers]
comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700
# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no
[MY_SHARE]
writeable = yes
path = <your/File/Path>
comment = Fileserver
guest account = <validUser>
wide links = no
security = user
Talvez isso ajude você a encontrar uma solução. Note que especialmente na seção global sua configuração parece muito curta para mim