We are running a multi-region architecture where our application in the US East (N. Virginia) Region processes data stored in an S3 bucket located in the EU (Frankfurt) Region. This has resulted in significant cross-region data transfer costs .
**we also have data residency policies that prevent us from relocating all data to a single Region.** 

1. What will be the best practices or architectural patterns to reduce these costs?
2. Can we use AWS PrivateLink, S3 Replication, or S3 Access Points to help?
3. Are there caching or edge computing strategies (e.g., Lambda@Edge, CloudFront) that could minimize repeated cross-region fetches?
4. How can we maintain compliance while improving performance and reducing cost?

How can I optimize data transfer costs between Amazon S3 and EC2 instances across different AWS Regions while ensuring compliance with data residency requirements?

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How can I optimize data transfer costs between Amazon S3 and...