Full node storage requirements for new 2MB block which is only 10% full

Mia: 2 weeks ago

If blocks were 2MB, and a 2MB block that is only 10% full gets confirmed, then how much additional storage is required on a full node?

I am guessing the correct answer here is 200K?

Thanks in advance for any guidance in this matter.

Elijah: 2 weeks ago

Full nodes are not required to store blocks (they can be pruned). So the answer is 0.

If a 200 kB block does get stored, it takes 200 kB to store it.