Most of that data is not the content of the tweet itself, but the metadata associated with it. When I last checked, we were storing about a kilobyte of data for every tweet.
Also, tweets are limited to 140 characters, not bytes - chinese tweets typically take about 200-250 bytes, for example.
Also, tweets are limited to 140 characters, not bytes - chinese tweets typically take about 200-250 bytes, for example.