I just added one seciton on /etc/samba/smb.conf and rename both on file:
[recalbox]
comment = Recalbox user data
path = /recalbox/share
writeable = yes
guest ok = yes
create mask = 0644
directory mask = 0755
force user = root
veto files = /._*/.DS_Store/
delete veto files = yes

[kodi]
comment = Kodi server
path = /var/recalboxfs/
writeable = yes
guest ok = yes
create mask = 0644
directory mask = 0755
force user = root
veto files = /._*/.DS_Store/
delete veto files = yes

Now it's appears on recalbox's IP.

I am on 4.0.1 version of recalbox, installed on RPi 3.
I settled the option to use an external drive, were my roms and media files.
Kodi can access the external drive, but I need to share the contents of the external drive over samba.
Is it possible? How do I do it?