Azure Storage Mover: Migrate S3 to Blob

Key insights

• Azure Storage Mover overview
  A managed Azure service that copies data directly from AWS S3 to Azure Blob storage. It helps reduce manual steps, supports large datasets, and lets you run discovery, syncs, and cutovers with minimal downtime.


• Prerequisites & permissions
  Ensure an Azure subscription, a target Storage Account or container, and an Azure Key Vault for encryption keys if needed. On AWS, create an IAM role or user with S3 read/list/get rights and attach a bucket policy that allows the transfer agent to access objects.


• High-level migration steps
  Register the S3 source and Azure Blob target in Storage Mover, run a discovery scan to list objects, create transfer tasks, run incremental syncs, then perform a final cutover when you’re ready to switch production traffic.


• Data compatibility & metadata
  Preserve object metadata, timestamps, and versions when possible; verify how S3 ACLs, storage classes, and server-side encryption map to Azure Blob properties. Plan for objects with versioning, immutability, or SSE-KMS keys and test a few sample buckets first.


• Performance tuning & costs
  Use parallel transfers and multipart uploads to boost throughput. Account for AWS egress charges and temporary EC2/data-transfer costs, and choose the appropriate Azure access tier to control ongoing storage costs.


• Validation, monitoring & rollback
  Compare object counts and checksums after transfers, use Azure Monitor and Storage Mover logs for errors and throughput, run application tests, and keep incremental syncs or a rollback plan until your cutover proves successful.

Keywords

Migrate AWS S3 to Azure Blob, Azure Storage Mover, Cloud-to-cloud migration, Migrate S3 to Azure Blob storage, AWS to Azure data migration, S3 to Blob transfer tools, Azure Blob migration best practices, Automated S3 to Azure migration