How to save hex format to file?

Hi!
I need save hex format, but I don't know how to do it
I have try code but it does not correct

Code:

---

QString filename;
    filename ="./data.hex";
    QFile file(filename);
    QByteArray frame_data;
    frame_data.append("D1A0A0FF");
    QByteArray frame_convert;
    frame_convert = QByteArray::fromHex(frame_data);
 
    if(file.open(QFile::WriteOnly)){
        QDataStream out(&file);
        out<< frame_convert;
    }

---

have solution for this?
thanks!

Why are you using a QDataStream?

Cheers,
_