On April 8, 2025, Backblaze, Inc. dismissed BDO USA, P.C. as its independent auditor and engaged Deloitte & Touche LLP for the year ending December 31, 2025, with no disagreements reported during the past two fiscal years. BDO's audit reports for 2023 and 2024 were unqualified, and all material weaknesses in internal controls were remediated by December 31, 2024.