Incorrect samba password for mounted devices

Not working. That option was already present in the global section, any difference between using it in the global section and the share section?

Edit:
I’ve tried the Galaxynik suggestion too but doesn’t work either, even if it worked I’d prefer to use user and password instead of using root user for these kind of things.

I will use osmc:osmc for the moment, thanks for your answers

I’ll have a look myself when I get a chance and see if I can figure out what’s missing. Guest shares should be possible and should be working from what you’ve done already.