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Backblaze B2 cloud storage, using B2’s native API with application keys.

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At a Glance

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Credentials

Create a secret with the Backblaze B2 provider type. The auth method is b2_application_key, which requires: Create an application key from the Backblaze dashboard under App Keys, scoped to the bucket you plan to transfer to or from.

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Location Setup

Example:

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Provider Quirks

B2 locations automatically receive optimized task defaults following Backblaze’s own recommendations: higher concurrency (transfers: 32), fast listing for large buckets, and b2_hard_delete: false so deletions hide file versions rather than permanently removing them. Override any of these in the task’s rclone configuration.

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Importing from rclone.conf

B2 remotes appear in rclone.conf as type = b2. The remote’s account field imports as application_key_id and key as application_key. See the rclone import guide.