Identify your specific device. The model "ZXDZ-01" is used for several types of hardware. Check your device:
Proceed with the method below that matches your hardware. zxdz 01 firmware update
If "ZXDZ-01" refers to a pair of wireless earbuds or a portable speaker: Identify your specific device
Sometimes a new update introduces more problems than it solves (e.g., removing 24fps option or adding a watermark). Downgrading is possible but risky. Proceed with the method below that matches your hardware
Method:
Safer alternative: Contact support and ask for a “recovery package” that forces the downgrade.