If you used a for your computer backup, Backblaze cannot view your files without it. To download them, you must provide this key during the restore process. How to Make Strong Encryption Easy to Use - Backblaze

How to Download Encrypted Files from Backblaze Downloading encrypted files from Backblaze depends on whether you are using the service or B2 Cloud Storage . While both offer robust security, the retrieval process varies significantly based on how your encryption keys are managed. 1. Backblaze Personal Backup: Restoring with a Private Key