good thanks for the support but i still can't access any shared folder i've already tried the possibilities but i can't get away with it. I will choose to do the opposite thing, I will put the "disk / nas" connected to libreelec, I enabled the LDNA option and then I can access all the smart tvs at home, this fight was just for one that is not smart tv, which in turn it is directly linked to libreelec. The option to turn on the NAS was just to have a shorter connection, I had less one IP on the network so I have 3 hops, otherwise I would have only 2 but I have already tested it and it looks good.
thank you all.