You were probably thinking of UniSuper [0], an Australian investment company with more than $80B AUM.

Their 3rd party backups with another provider were crucial to helping them undo the damage from the accidental deletion by GCloud.

GCloud eventually shared a post-mortem [1] about what went down.

0: https://news.ycombinator.com/item?id=40304666

1: https://cloud.google.com/blog/products/infrastructure/detail...