Billing AWS Free Trial 120$

I understand your concern about the rapidly decreasing AWS credits. This is a common issue for new AWS users.

To understand where your free credits are being used:

1. Check your AWS Billing Dashboard - This will show exactly which resources are generating charges.

2. Look for resources that are not covered by the Free Tier - Some common culprits for unexpected charges include:

• NAT Gateways (these are not included in Free Tier and can be expensive)
• EC2 instances that are larger than the Free Tier eligible types
• Resources running in multiple regions (the Free Tier limits apply across all regions combined)
• Elastic IP addresses that aren't attached to running instances

3. Even when using the Free Tier, certain actions can lead to billable usage:

• Stopped (but not terminated) EC2 instances may still incur charges for associated EBS volumes
• Exceeding the 750 hours per month limit for EC2
• Using services not covered by the Free Tier

4. Use AWS Cost Explorer to identify which specific resources are incurring the higher costs.

5. Immediately review and delete any resources you're not actively using to prevent further charges.

For future protection, set up AWS Budgets or Free Tier usage alerts to be notified before exceeding limits. This will help you avoid unexpected charges as you learn to use AWS services.
Sources
Getting billed for free tier ? | AWS re:Post
Billing misunderstand | AWS re:Post
The unexpected billing issue | AWS re:Post