I am using this code to download a DataURL to a file

    function downloadURI(uri, name) {
        var link = document.createElement("a");
        link.download = name;
        link.href = uri;
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
        delete link;
      }

      downloadURI(data, "images/helloWorld.png");

but it tries to download to user storage. I want to download to server storage (For example download to "images/download.png" rather than prompt the user to download on their computer.

I tried to pass into PHP but the dataurl is too large for ajax to pass through.