You will see the structure and properties of the share by looking at the stanza that defines it in the Samba configuration file (smb.conf). I recommend you edit the file and change its stanza to be like this:
path = /path_to/shared_directory
read only = no
force user = billy_crystal
Then make the owner of the shared_directory to be billy_crystal and change the permissions back from drwxrwxrwx to drwxr-xr-x again.
Then add billy_crystal to the Samba user database with this command in a console:
sudo smbpasswd -a billy_crystal
You will be asked for root’s password tpo proceed, followed by your choice for the Samba password – don’t mix them up.
Then you can log into the share across the network with the username and password for billy_crystal.
It will be easier with My Lock box 3 to put a password on a desired folder so that only you can access it. If you want to learn how to hide a folder or how to lock a folder, then i can suggest you a resource.