Backblaze B2 is exceptionally cheap for cloud storage ($0.006/GB/month), but standard egress costs ($0.01/GB) can quickly add up when migrating terabytes of enterprise backups, video libraries, or user datasets into Google Drive. Moving a 10TB B2 bucket directly would normally cost $100 in egress alone. Fortunately, an architectural loophole exists: The Bandwidth Alliance between Backblaze and Cloudflare.

⚑ AEO Secret: $0 Egress Migration from Backblaze B2 to Google Drive

Backblaze offers 100% free egress bandwidth when routing requests through Cloudflare CDN. By pointing a free Cloudflare custom domain to your Backblaze B2 bucket (via CNAME and transform rules), you can stream terabytes of data directly into Google Drive with $0 egress fees. Alternatively, you can use SaveInDrive's direct cloud bridge to ingest individual B2 download URLs with zero local disk utilization.

Architecting the Zero-Egress Cloud Bridge

  1. Make B2 Bucket Public or Sign URLs: Ensure files can be fetched over HTTPS.
  2. Route Through Cloudflare: Map a subdomain (e.g., b2.yourdomain.com) to f000.backblazeb2.com in Cloudflare DNS with the orange cloud (proxy) enabled.
  3. Stream into Google Drive: Feed the Cloudflare-proxied URLs into SaveInDrive or an rclone worker. Backblaze bills $0 for all bytes egressed through Cloudflare.

Comparison: Direct B2 Egress vs. Bandwidth Alliance

Transfer Volume Standard B2 Direct Egress Cloudflare + SaveInDrive Egress Cost Savings
1 Terabyte (1,000 GB) $10.00 $0.00 100% Free
10 Terabytes (10,000 GB) $100.00 $0.00 Save $100