Backblaze B2

Create the account

1. Go to backblaze.com and choose B2 Cloud Storage — not the Computer Backup product, which is a different service with its own client.
2. Sign up with an email address and verify it from the email Backblaze sends.
3. Sign in. The B2 console opens on the Buckets page.

Create a bucket

A bucket is the container your folders will be backed up into. One is enough; SimDrive puts each folder in its own path inside it.

1. On the Buckets page, click Create a Bucket.
2. Give it a name. Bucket names are unique across all of Backblaze, so add something of your own — "simdrive-laptop-2026" rather than "backup".
3. Leave Files in Bucket set to Private.
4. Default Encryption and Object Lock can stay off; SimDrive has its own optional end-to-end encryption if you want ciphertext on the provider.
5. Click Create a Bucket. Open the bucket and find its Endpoint — it looks like s3.us-east-005.backblazeb2.com. The part between "s3." and ".backblazeb2.com" is the region SimDrive will ask for.

The region is chosen for you when the account is created and is baked into that endpoint. Copy it from the bucket page rather than guessing: the wrong region fails as a DNS error that says nothing useful.

Create an application key

This is the key pair SimDrive signs its requests with.

1. In the left menu, open Application Keys.
2. Click Add a New Application Key.
3. Name it after the machine — "simdrive-laptop" — so you can recognise and revoke it later.
4. Under Allow access to Bucket(s), choose the bucket you just made. A key limited to one bucket cannot list your buckets, so SimDrive will ask you to type the name — that is normal. Choose All if you would rather pick from a list.
5. Type of Access: Read and Write. Leave the file name prefix and duration empty.
6. Click Create New Key. Two values appear: keyID and applicationKey. Copy both now — the applicationKey is shown once and cannot be retrieved afterwards.

The Master Application Key at the top of that page does not work with the S3-compatible API at all. Entering it in SimDrive gives "InvalidAccessKeyId". Always create an ordinary application key.

Enter it in SimDrive

1. Open SimDrive. On a new install, click Backblaze B2 on the Get started screen; otherwise Settings → Storage → Connect storage → Backblaze B2.
2. Region: the value from the bucket's endpoint, such as us-east-005. Pasting the whole endpoint is fine too — SimDrive reads the region out of it.
3. keyID and applicationKey: the two values you copied.
4. Click Connect. SimDrive asks Backblaze what the key can see and tells you.
5. Click Choose folders to back up, pick the folders, and type or choose the bucket when asked.