So, just for fun. The video quotes "over 1PB" of storage per box.

I count 6 columns of 15 rows/drives. Might be 7 columns even, there's some panels that aren't fully open on the video.

So, 90-105 drives. I'm guessing they are using 10TB drives, although maybe they can get bigger unannounced drives? Roughly, the math seems to check out.

Quite impressive. Guess the Backblaze guys need a Storage Pod 6.0 soon :P (I know, I know, different requirements/constraints)