Transfer S3 Buckets to New Accounts

Move all S3 buckets from current account to new prod/nonprod accounts.

• Inventory all existing S3 buckets
• Classify buckets by environment (prod vs nonprod)
• Create corresponding buckets in target accounts via IaC
• Sync existing data to new buckets
• Update application configurations to use new bucket names/ARNs
• Update IAM policies for cross-account or new-account access
• Verify data integrity after migration
• Decommission old buckets after validation period

Open questions:

• What is the cutover strategy? (Sync and switch, or gradual migration?)
• How long should old buckets be retained after migration?