Comment by espadrine

AWS: $0.024/GB/month (S3 standard, first 50 TB/month)

GCP: $0.023/GB/month (standard storage, beyond 5 GB free limit)

Azure: $0.019/GB/month (hot, first 50 TB/month)

Cloudflare: $0.015/GB/month (beyond 10 GB free limit)

Scaleway: ~$0.013/GB/month (single-zone)

Backblaze: $0.006/GB/month

Hetzner: ~$5.49/month + $0.0054/GB/month (beyond 1TB free limit)

Egress costs vary though.