system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: (2)1TB hard drives. 1st is completely full of data, the other is factory sealed & unused. Will one HD weigh just slightly more than the other?

Even just a flake of dust more?
gpt
No there wouldn't, assuming they are completely identical apart from the data. The data is encoded as the direction of the magnetic field in a cell. So a magnetic field pointing one way would be 1, and a field pointing the opposite way would be 0. Both these states weigh the same.

Of course, in reality the hard drives wouldn't be completely identical anyway, so there would definitely be some tiny weight difference.