Hi there,
Thanks dadoonet and all others for your support.
Finally i fixed it.
I created a new shared folder, i give full permision to elasticsearch user, i mounted the folder in my ES cluster with this statement:
mount -t cifs -o dir_mode=0764,uid=,gid=,username=,password= //IP/sharedfolder /folder/to/mount
Note that i left empty the fields, but it must be fullfill.
Thanks