Developer Quick-Start Guide

Before you begin: You must have a Backblaze B2 Cloud Storage account. You can sign up here. If you already have a Backblaze account and the left navigation menu contains a B2 Cloud Storage section, your account is already enabled for Backblaze B2.

1. Sign in to your Backblaze account.
2. In the left navigation menu under Account, click My Settings.
3. Under Enabled Products, select the checkbox to enable B2 Cloud Storage.
4. Review the Terms and Conditions, and click OK to accept them. 

1. Sign in to your Backblaze account.
2. In the left navigation menu under B2 Cloud Storage, click Buckets.
3. Click Create a Bucket.
4. Enter a name for your bucket.
   Bucket names must be at least six characters and globally unique. A message is displayed if your bucket name is already in use.
5. Select a privacy setting: Private or Public.
   Files that are in a private bucket require authentication to perform an action, for example, downloading. Public buckets do not require authentication so you can easily share files. You can change a bucket's privacy settings at any time.
6. If applicable, enable a Backblaze B2 server-side encryption key.
7. Enable Object Lock to restrict a file from being modified or deleted for a specified period of time.
8. Click Create a Bucket, and copy the value that is in the Endpoint field; you may need this value for other processes.
9. Click Lifecycle Settings to control how long to keep the files in your new bucket.

You can upload files to a Backblaze B2 bucket from your local drive. The maximum single file size that you can upload through the Backblaze web UI is 500 MB. If you need to upload larger files, click here for more information. You can also use the B2 Native API or the Command-Line Interface to upload files.

1. Sign in to your Backblaze account.
2. In the left navigation menu under B2 Cloud Storage, click Buckets.
3. In your bucket details, click Upload/Download and click Upload.
4. Drop your images from your local drive into the dialog box, or manually select your files.
5. In the left navigation menu, click Browse Files to see your uploaded file and click the image filename to see more details.

You can view the following details after your file is uploaded.

% curl -I
https://my-unique-bucket-name.s3.us-west-004.backblazeb2.com/my-sample-image.png
HTTP/1.1 200
Accept-Ranges: bytes
Last-Modified: Wed, 20 Jul 2022 21:18:44 GMT
ETag: "94ef3ecd9772a6dd5d4bdaebddce6a16"
x-amz-meta-src_last_modified_millis: 1658351049017
x-amz-request-id: a2286d690971ff97
x-amz-id-2: aM7Vk6DhsMVhmSTaDN1g4DmI7OB80nzMB
x-amz-version-id: 4_ze30d68217f1617d88b280413_f10477368fe8fd6f1_d20220720_m211844_c004_v0402004_t0001_u01658351924129
Content-Type: image/png
Content-Length: 79571
Date: Wed, 20 Jul 2022 22:07:18 GMT

Application keys control access to your Backblaze B2 Cloud Storage account and the buckets that are contained in your account.

1. Sign in to your Backblaze account.
2. In the left navigation menu under Account, click Application Keys.
3. Click Add a New Application Key, and enter an app key name.
       You cannot search an app key by this name; therefore, app key names are not required to be globally unique.
4. Select All or a specific bucket in the Allow Access to Bucket(s) dropdown menu.
5. Optionally, select your access type (Read and Write, Read Only, or Write Only).
6. Optionally, select the Allow List All Bucket Names checkbox (required for the B2 Native API b2_list_buckets and the S3-Compatible API S3 List Buckets operations).
7. Optionally, enter a file name prefix to restrict application key access only to files with that prefix. Depending on what you selected in step #4, this limits application key access to files with the specified prefix for all buckets or just the selected bucket.
8. Optionally, enter a positive integer to limit the time, in seconds, before the application key expires. The value must be less than 1000 days (in seconds).
9. Click Create New Key, and note the resulting keyID and applicationKey values.