I´m trying to upload one file to the localhost, but not working

I´m trying to upload one file to the localhost server, but it doesnt work. I'm trying to give permissions to the folder where the file is to be located using chmod, but I do not get it. The form is printed dynamically in one file called index.php and, when the submit is clicked, the datas are recieved to the same php file called recExpediente.php.I´m trying to upload one file to the localhost