Skip to content
Blober Download Docs
Articles

Backblaze B2

Backblaze B2 is affordable cloud storage with an S3-compatible API. Blober connects via the S3 layer for reliable compatibility.

Path format:

bucket-name/path/to/file.ext

Capabilities

Section titled “Capabilities”
  • ✅ Browse buckets and objects
  • ✅ Upload files (multipart for large files)
  • ✅ Download files
  • ✅ Delete objects
  • ✅ Copy/move objects
  • ✅ Automatic region detection per bucket
  • ✅ Storage class selection (inherited from S3)

Prerequisites

Section titled “Prerequisites”
  • A Backblaze account (create one)
  • At least one B2 bucket
  • An application key with appropriate permissions

Required Credentials

Section titled “Required Credentials”

Application Key ID

Section titled “Application Key ID”
  • Option key: applicationKeyId
  • Format: 25 alphanumeric characters
  • Example: 0000123456789abcdef000000

Application Key

Section titled “Application Key”
  • Option key: applicationKey
  • Format: 31 characters
  • Example: K000abcdefghijklmnopqrstuvwxy

Setup (Backblaze Console)

Section titled “Setup (Backblaze Console)”

1. Create a B2 Bucket

Section titled “1. Create a B2 Bucket”
  1. Go to Backblaze B2 Console
  2. Click Create a Bucket
  3. Enter a unique bucket name
  4. Choose Private or Public as needed
  5. Click Create a Bucket

2. Create an Application Key

Section titled “2. Create an Application Key”
  1. Go to App Keys in the B2 Console
  2. Click Add a New Application Key
  3. Configure the key:
    • Name: Give it a descriptive name (e.g., blober-key)
    • Allow List All Bucket Names: ✅ Enable for bucket browsing
    • Access: Select buckets or “All” for full access
    • Permissions: Read and Write (or as needed)
  4. Click Create New Key
  5. Copy the keyID and applicationKey immediately (the secret is shown only once!)

3. Configure in Blober

Section titled “3. Configure in Blober”
  1. In Blober, go to Workflows => New Workflow
  2. Select Backblaze B2 as source or destination
  3. Enter your Application Key ID and Application Key
  4. Test by browsing your buckets

Troubleshooting

Section titled “Troubleshooting”

”Unauthorized” or “401” error

Section titled “”Unauthorized” or “401” error”
  • Verify your Application Key ID and Application Key are correct
  • Check if the key has expired or been revoked
  • If using a bucket-scoped key, ensure it has access to the bucket you’re trying to browse

Buckets not showing up

Section titled “Buckets not showing up”
  • Make sure Allow List All Bucket Names is enabled on your application key
  • If using a restricted key, it can only see buckets it has access to

Slow downloads

Section titled “Slow downloads”
  • Backblaze B2 download speeds depend on your region and connection
  • Files are served from the bucket’s region - choose a region close to you when creating buckets

Best Practices

Section titled “Best Practices”
  • Use bucket-scoped keys in production for better security (limit access to specific buckets)
  • Enable versioning on buckets with important data for accidental deletion protection
  • Backblaze B2 pricing is simple: $6/TB/month storage, $0.01/GB download (first 1 GB/day free)

External References

Section titled “External References”