Data transfer costs are the most consistently underestimated line item in AWS They're not the biggest cost in most accounts. But they're the one that grows the fastest as systems scale, the one nobody was thinking about when the architecture was designed, and the one that's hardest to reduce wit...
Source: [Dev.to](https://dev.to/vlad_z_16b6320e21f32bee0d/data-transfer-is-the-aws-line-item-everyone-underestimates-5aak)