First, let's consider the number of Netflix subscribers globally. It's around 200 million.

Assume that each subscriber, on average, watches about 2 hours of content daily. This could be a movie, a couple of episodes of a TV series, or a mix of different content.

The amount of data consumed during streaming depends on the quality of the video. According to Netflix's own data, it uses about 1 GB of data per hour for each stream of standard definition video, and up to 3 GB per hour for each stream of HD video.

Given the diversity of users and their different internet capabilities and preferences, we might surmise that half of the users stream in standard definition and the other half in high definition.

The data consumed by SD users per day would be: 100 million (users) * 2 (hours) * 1 GB (data per hour) = 200 million GB.

For HD users, the data consumed would be: 100 million (users) * 2 (hours) * 3 GB (data per hour) = 600 million GB.

Adding these two amounts together, we can estimate that Netflix users worldwide consume around 800 million GB of data per day.