# Backblaze B2

Backblaze B2 Cloud Storage is an S3-Compatible object storage solution.

## Connection Parameters

Enter the connection parameters for your Backblaze B2 Cloud Storage bucket.

### Key ID

The B2 Key ID is your unique identifier for authentication.

### Application Key

The Application Key is your private authentication key that pairs with your Key ID. Use a generated [Application Key](https://www.backblaze.com/docs/cloud-storage-application-keys), not the Master Application Key. The Master key is not S3-compatible.

When you save your connection info in ExpanDrive, the Application Key is [securely stored](/security.md#authentication) within your local keychain.

### Nickname

The nickname identifies the connection. This name will show up as the volume label on the mounted drive.


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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

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```

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