How can I edit resource file?

Hi

I have a XML file in some folder of my project.

I can to read the file but I am not able to write.

I have this error:

QIODevice::write (QFile, ":\files\zoom.XML"): device not open

Code:

void MyXML::save(){
 
    QFile file(":/files/zoom.XML");
    if (!file.open(QIODevice::WriteOnly | QFile::Text))
        return;
 
    QXmlStreamWriter xmlWriter(&file);
    xmlWriter.setAutoFormatting(true);
    xmlWriter.writeStartDocument();
 
    xmlWriter.writeStartElement("record");
 
    xmlWriter.writeAttribute("prop1",newProp1);
    ...
	...
    xmlWriter.writeAttribute("propn",newPropn);
 
    xmlWriter.writeEndElement();
}