Save your current settings to an external drive.
If you receive a "wrong file format" error, double-check that your model number is exactly compatible with the ZS63WBKR00 build. zs63wbkr00 firmware link
Use an MD5 or SHA-256 checksum to verify the downloaded ZS63WBKR00 file. 2. The Flashing Process Log into your device’s Administrative Interface . Navigate to System Tools > Firmware Upgrade . Click Browse and select the ZS63WBKR00 file you downloaded. Click Upgrade and wait. Do not power off the device. 3. Post-Update Verification Save your current settings to an external drive