title: Pinata: How to add files to an existing folder
body: <p>I found out a way to add files to an existing folder with IPFS thanks to this question:
  <a href="https://stackoverflow.com/questions/39803954/ipfs-how-to-add-a-file-to-an-existing-folder">IPFS: How to add a file to an existing folder?</a></p>
  <p>but I was wondering if there is a similar solution using Pinata service？</p>