Firmware updates generally do not delete user data (fingerprints/logs), but it is standard safety protocol to backup first.

Updates frequently fix bugs that cause devices to freeze, lose network connection, or fail to sync biometric templates.

keep your data, it is highly recommended to back up your users and logs first, as a firmware flash sometimes resets the device to factory settings. Final Verdict Rating: 3.5/5 Updating ZKTeco firmware is critical for long-term stability

There are two primary methods depending on your device type: Plug the USB drive into the device's port. Enter the Main Menu (usually requires Admin privileges).

: Ensure all attendance logs and user data are backed up to your management software before starting, as a precaution. Phase 2: Implementation (Step-by-Step)

Navigate to . Write down the current version (e.g., V1.0.2 ). You only need an update if the new version is higher.

If a attempt fails and the device shows a black screen or a blinking blue light, you have a "bricked" device. Recovery is possible but technical.