How to Migrate from Backblaze B2 to AWS S3 — Step-by-Step with RcloneView
Backblaze B2 is great for affordable storage. But when you need AWS ecosystem integration — Lambda triggers, CloudFront CDN, Athena queries — you need S3. Here's how to migrate without data loss.
Backblaze B2 and AWS S3 are both S3-compatible, making migration straightforward with the right tool. The main considerations are egress costs, transfer time, and verification. RcloneView handles the transfer while giving you visual monitoring and verification.
Manage & Sync All Clouds in One Place
RcloneView is a cross-platform GUI for rclone. Compare folders, transfer or sync files, and automate multi-cloud workflows with a clean, visual interface.
- One-click jobs: Copy · Sync · Compare
- Schedulers & history for reliable automation
- Works with Google Drive, OneDrive, Dropbox, S3, WebDAV, SFTP and more
Free core features. Plus automations available.
Migration Planning
Cost estimation
B2 egress: $10/TB (or free via Cloudflare Bandwidth Alliance).
| Data Volume | B2 Egress Cost | S3 Storage (first month) |
|---|---|---|
| 100 GB | $1 | $2.30 |
| 1 TB | $10 | $23 |
| 10 TB | $100 | $230 |
Timeline
Transfer speed depends on your connection and B2/S3 throughput. Both services handle high parallelism well.
Step-by-Step
1) Add both remotes
2) Browse and compare
3) Run Copy job
Use high parallelism (16–32 transfers) — both B2 and S3 handle it well.
4) Monitor progress
5) Verify completeness
Post-Migration
- Update application configs — Point apps to S3 endpoints.
- Test thoroughly — Verify reads and writes work correctly.
- Keep B2 for 30 days — Fallback in case of issues.
- Delete B2 data — After confirming everything works on S3.
Getting Started
- Download RcloneView from rcloneview.com.
- Add B2 and S3 as remotes.
- Run Copy job with high parallelism.
- Verify with Folder Comparison.
Same API, bigger ecosystem.
Related Guides:
Supported Cloud Providers
