Some previous discussion: https://news.ycombinator.com/item?id=30330740
Pixar almost deleted Toy Story 2 (2012) https://news.ycombinator.com/item?id=33344516
Did Pixar accidentally delete Toy Story 2 during production? (2012)
https://news.ycombinator.com/item?id=13417037
How Pixar Almost Lost Toy Story 2 To A Bad Backup