Two questions:
1. Does /storage/PELICULAS exist? if not, create it with mkdir /storage/PELICULAS.
2. Can you access //192.168.1.1/usb1/PELICULAS without username/password? If not, set them.
Thanks for your time and your answers!
Yeah, Im thinking the problem could be username/password. My router don´t let me set a username for the samba server (for FTP, you can). How can I fix no user/password (or set it as empty) in the configuration?