Code

gistfile1.php

add_filter( 'fu_is_debug', '__return_true' );

add_action( 'fu_after_upload', 'my_fu_after_upload', 10, 3 );
function my_fu_after_upload( $attachment_ids, $success, $post_id ) {
    // do something with freshly uploaded files
    // This happens on POST request, so $_POST will also be available for you
    $dest_folder = "/exports/data/".$post_id;

    echo "FUNCTION AFTER UPLOAD: " . "<br>attachment_ids=";
    print_r($attachment_ids);
    echo "<br>result=". $success . "<br>post_id=". $post_id ;
    print_r($_POST);

    $post_name = get_post_field( 'post_title', $post_id, "");
    echo "Post name = " . $post_name . "<br>";

    if (!is_dir($dest_folder))
        mkdir($dest_folder);
    $upload_dir =  wp_upload_dir();
    echo "Upload dir<br>";
    print_r($upload_dir);

    foreach ($attachment_ids as $attachment_id) {
        printf("Getting attacments to atta %d <br>", $attachment_id);
        $file = wp_get_attachment_metadata( $attachment_id, false);
        print_r($file);
        echo "<br>";
        $file = $file['file'];
        $source_file = $upload_dir['basedir'] .'/'. $file;
        // Get the last name of the file, ie for /2013/07/file.img returns file.img
        $file = explode('/', $file);
        $file = $file[count($file) - 1];
        // Get the file extension
        $f_extension = explode('.', $file);
        if (count($f_extension) < 2 ) {
            $f_extension = "";
        } else {
            $f_extension = $f_extension[count($f_extension) - 1];
        }

        $dest_file = $dest_folder . '/' . $_POST['ra'] . '.' . $f_extension;

        printf("Copying '%s' to '%s'<br>", $source_file, $dest_file);
        // TODO: Verificar se não existe o arquivo antes
        copy($source_file, $dest_file);

    }
    flush();
}

add_action('fu_upload_result', 'my_fu_upload_result', 10, 2 );
function my_fu_upload_result( $layout, $result ) {
    // do something
    echo "FUNCTION UPLOAD RESULT: " . "<br>layout=" . $layout .
        "<br>result=". $result;
    print_r($_POST);

}