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Backblaze B2

Mount a Backblaze B2 bucket as a Windows drive via B2's S3-compatible API.

Before you begin

You need an Application Key: the keyID is the access key and the applicationKey is the secret.

Where to get the keys — on the Application Keys page of the Backblaze console: click Add a New Application Key, choose the bucket scope, and copy the applicationKey — it is shown only once.

The key must be S3-API capable — the account master key, and keys created before B2's S3 API launch, do not work with the S3 endpoint; create a new application key instead — see Backblaze: S3-compatible app keys.

Help from Backblaze

Connect

  1. Click Add in the toolbar.
  2. Choose Enterprise → Backblaze B2.
  3. Enter the keyID as Access Key ID and the applicationKey as Secret Access Key, then click the Refresh button next to the bucket field.
  4. Select the bucket and click Connect.

Backblaze B2 connection dialog

Manual bucket entry

If your key is not allowed to list buckets, tick the checkbox to the left of the bucket field and type the bucket name directly.

Settings

Setting Description Default
Access Key ID / Secret Access Key B2 application key's keyID / applicationKey —
Bucket The bucket to mount (list or manual entry) —
Read-only Blocks writes to the mounted drive off

Behavior & limits

  • The drive talks to s3.<region>.backblazeb2.com; the region is part of the bucket's endpoint shown in the B2 console.
  • S3 semantics: renaming a large folder tree copies and deletes every object under the prefix.

Troubleshooting

Symptom Cause Fix
Authentication fails Master key or pre-S3 key used Create a new application key in the console
Bucket list empty Key is restricted to one bucket Type the bucket name manually