Our numbers as of the end of 2021: https://archive.org/web/petabox.php

    4 data centers, 745 nodes, 28,000 spinning disks
    Wayback Machine: 57 PetaBytes
    Books/Music/Video Collections: 42 PetaBytes
    Unique data: 99 PetaBytes
    Total used storage: 212 PetaBytes