CES 2019: Ezviz Wi-Fi doorbell has a microSD card slot
https://www.cnet.com/news/ezviz-wi-fi-doorbell-has-a-microsd-card-slot-ces-2019/
But with a built-in card slot and optional cloud storage services, Ezviz gives you choices.
Ezviz also says its new Wi-Fi-enabled buzzer works with Amazon Alexa and Google Assistant.