Dahua employs "anti-rollback" protection on the DH-XVR4A08. Once you install a 2024 or 2025 firmware, you cannot go back to a 2022 version. Attempting to do so will result in a "File too old" error or a brick.
Only downgrade if official release notes explicitly allow it (usually not possible). dh-xvr4a08 firmware download
Method A: Via Local GUI (Monitor + Mouse) – Recommended Dahua employs "anti-rollback" protection on the DH-XVR4A08
Method B: Via Web Browser (Config Tool)
Sometimes global firmware lags behind localized versions. Method B: Via Web Browser (Config Tool) Sometimes