How to download URL from CreateObjectURL and save it in a folder

I’m making a website that can record audio for 5 seconds, it works, but when the 5 seconds finish I want the audio to download or to be save in a folder of my project, is it posible? here is my code:

navigator.mediaDevices.getUserMedia({ audio: true })
  .then(stream => {
    const mediaRecorder = new MediaRecorder(stream);
    mediaRecorder.start();


    const audioChunks = [];

    mediaRecorder.addEventListener("dataavailable", event => {
      audioChunks.push(event.data);

    });

    mediaRecorder.addEventListener("stop", () => {
      const audioBlob = new Blob(audioChunks)
      const audioUrl = URL.createObjectURL(audioBlob);
      const audio = new Audio(audioUrl);
      audio.play();
    });

And I want to make something like this

    mediaRecorder.addEventListener("stop", () => {
      const audioBlob = new Blob(audioChunks)
      const audioUrl = URL.createObjectURL(audioBlob);
      const audio = new Audio(audioUrl);
      audio.play();
      audio.save("direction-of-the-folder/") // MAKE this
    });

Thank you in advance:)