title: Jupyter Notebook didn't save for over a day. How can I recover lost work?
body: <p>I've lost a day's work in Jupyter Notebook because it didn't autosave. As I was working, I would click on <code>File</code> > <code>Save and Checkpoint</code> to be safe. I closed the notebook when I finished working and when I tried reopening it, I see that essentially all my work is gone and it says <code>Last Checkpoint: a day ago (autosaved)</code> next to the filename. I now realize that I had been working for a long time on the notebook with an orange box with some kind of error message. I'm sorry that I can't remember the specific message right now, but I think it was something involving <code>POS</code> or <code>POST</code> or <code>POSIT</code> ...?. I saw <code>Trusted</code> next to the error message, so I must've thought things were OK.</p>
  
  <p>I tried opening the <code>filename-checkpoint.ipynb</code> file within the <code>.ipynb_checkpoints</code> folder but it's blank. I looked up a possible solution on <a href="https://medium.com/flatiron-engineering/recovering-from-a-jupyter-disaster-27401677aeeb" rel="noreferrer">Recovering from a Jupyter Disaster</a>, but it requires SQL, which I don't know. Is there any hope for recovering my work? I realize that this is probably a rookie mistake, but I'm pretty new at this.</p>
  
  <p>Thanks</p>
  
  <p>PS: I'm running Python3 on MacOS</p>