I wonder how big the download was.

I will read 100200300 as two hundred thousand one hundred one hundred million from now on.

I discovered this format on 01-02-03.

That doesn’t sort well. If you read left to right, you can’t assume year so you have to read it in full, working backwards, to get the full meaning.

Year first means you get more specific while reading. Natural logic and hierarchy in reading direction.

Which symbols do you suggest?