How much is Amazon AWS EC2 Free tier Bandwidth Limit?

It appears there may be some confusion regarding the different aspects of the AWS Free Tier for EC2. Let me clarify:

The 30 GB limit you're seeing is specifically for Amazon Elastic Block Storage (EBS), not for data transfer or bandwidth. This aligns with what you mentioned about getting 30 GB of EBS storage free for 12 months as part of the AWS Free Tier.

Regarding data transfer, you are correct that Amazon has recently updated their Free Tier offering. As of the latest information, AWS provides up to 100 GB of free data transfer out to the internet per month. This is separate from the EBS storage limit.

The email you received is likely warning you about approaching the 30 GB EBS storage limit, not a bandwidth limit. To avoid incurring charges, you should monitor your EBS usage and ensure you're not exceeding the 30 GB of storage provided in the Free Tier.

It's important to regularly check your Free Tier usage in the EC2 Dashboard to avoid unexpected charges. The EC2 Free Tier box in the dashboard will show you warnings if you're approaching or exceeding limits, and it displays usage percentages for various resources including EBS storage.

Remember, while the Free Tier offers generous allowances, exceeding any of these limits will result in standard pay-as-you-go charges. So it's crucial to keep an eye on your usage across all Free Tier eligible services, not just data transfer.
Sources
Track your Free Tier usage for Amazon EC2 - Amazon Elastic Compute Cloud
Amazon EC2 instance network bandwidth - Amazon Elastic Compute Cloud