title: File upload form in HTML site with saving on Google drive or Dropbox
body: <p>I have built a contact form (using <a href="https://www.google.com/forms/about/" rel="nofollow">Google Forms</a> to save results in Google Sheets) for my company website. But I also need to add a file upload function to this form. Google Forms only allows image attachments. I need images, pdf, rar, etc.</p>
  
  <p>I have found a <a href="https://script.google.com/d/1x3p9ZAv-SafEK06r_Vr7fVuUNtEfBg1SGhmSYWjQ0kuPTk-y55a7Nink/edit?usp=sharing" rel="nofollow">JS script</a> for file upload, but the form works only directly on the link, and I can't use this form on my site. Also, creating many folders doesn't work entirely, but seems to depend on the inserted name.</p>
  
  <p>How can I build some form to allow uploading files for anyone on my cloud account and integrate it in the contact form on Company site? </p>
  
  <p>P.S. I can't use <code>PHP</code> scripts on Company site, only raw HTML files.</p>