How much storage does Twitter need per month for tweet content?

The scenario

You’re doing capacity planning for a Twitter-scale social platform. The service has 100 million active users and receives 500 million tweets per day.

A tweet record includes: tweet ID (8 bytes), user ID (32 bytes), text (up to 140 bytes), and — critically — an average of ~10 KB of attached media per tweet.

How much new storage does the platform need to provision per month?

Adapted from: donnemartin/system-design-primer — Design Twitter Timeline — CC BY 4.0