If we assume enterprise HDDs in the double digit TB range then one can estimate that the total S3 storage volume of AWS is in the triple digit Exabyte range. That's propably the biggest storage system on planet earth.
This piece is interesting background, but worth noting that the actual numbers are highly speculative. The NSA has never disclosed hard data on capacity, and most of what's out there is inference from blueprints, water/power usage, or second-hand claims. No verifiable figures exist.
If we assume enterprise HDDs in the double digit TB range then one can estimate that the total S3 storage volume of AWS is in the triple digit Exabyte range. That's propably the biggest storage system on planet earth.