Backblaze B2 Setup: Connect & Transfer Files

Backblaze B2 is cloud storage with an S3-compatible API, and Blober connects to it through that API. You enter an application key, and Blober finds the region of your account from it. You do not enter an endpoint or a region.

Path format:

bucket-name/path/to/file.ext

• ✅ Browse buckets and objects
• ✅ Upload files (including large files)
• ✅ Download files
• ✅ Delete objects
• ✅ Copy/move objects. With the same key on both sides, Blober copies and moves them inside Backblaze, so the files do not pass through your computer
• ✅ Keys for all buckets or for one bucket

• A Backblaze account (create one)
• At least one B2 bucket
• An application key with appropriate permissions

• Example: 0000123456789abcdef000000
• The Master Application Key does not work with Blober. Create a new application key

• Example: K000abcdefghijklmnopqrstuvwxyz0

1. Go to Backblaze B2 Console
2. Click Create a Bucket
3. Enter a unique bucket name
4. Choose Private or Public as needed. Blober does not need a public bucket
5. Click Create a Bucket

1. Go to Application 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 access to Bucket(s): "All", or one bucket. A key for one bucket shows only that bucket in Blober
   • Type of Access: Read and Write. A Read Only key works only as the source of a Copy workflow.
4. Click Create New Key
5. Copy the keyID and applicationKey straight away. Backblaze shows the secret only once

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

• Check the Application Key ID and the Application Key. Copy them again if you can
• Check that the key is still on the Application Keys page. A deleted key stops working at once

• The destination key is Read Only, or it is for another bucket. Blober stops the transfer, because no file can go into that bucket
• Use a key with Read and Write access to the destination bucket, then retry the task

• A Move or Delete workflow removes files from the source, so the source key needs Read and Write access
• With a Read Only key, Blober shows the buckets, folders and files as readonly. You can copy them, but you cannot select anything for a Move or Delete workflow

• The key is for one bucket, and the workflow uses another bucket. Use a key for all buckets, or for that bucket

• Backblaze refuses requests when a daily cap for storage, downloads or transactions in Caps & Alerts is reached. Blober stops the transfer and shows the message from Backblaze
• Raise the cap in the B2 Console, or wait for the next day, then retry the task. Files that finished stay done

• Check the internet connection. A firewall or proxy must allow api.backblazeb2.com and the S3 endpoint of your account, for example s3.us-west-004.backblazeb2.com

• A key for one bucket shows only that bucket. To see all buckets, use a key with access to all buckets

• Backblaze B2 download speeds depend on your region and connection
• All buckets of an account are in the region that you chose when you made the account

• Use bucket-scoped keys in production, so each key can reach only the buckets it needs
• B2 keeps older versions of a file. When Blober overwrites, deletes or moves a file, the older version stays and counts as stored data until you delete it or a lifecycle rule removes it. Which clouds keep the old copy on overwrite compares B2 with other providers
• Backblaze B2 pricing: $6.95/TB a month for storage. Downloads are free up to three times the data you store, then $0.01/GB. See the pricing page for current prices

• B2 Cloud Storage Documentation
• Creating App Keys
• B2 S3-Compatible API
• Backblaze B2 Pricing