Безопасно ли продавать устройство Chromecast Google?

I have a Google Chromecast device that I am going to sell because I do not use it very much. My question is, do I need to do anything to it before selling it? Is there any personal data stored on it? Do I need to reset it so that the other person will not know my Wi-Fi or Netflix passwords?

I believe Google Chromecast stores information from your router in order to connect. Either way, it is never a bad idea to reset electronics before selling them.

There are two ways to reset it:

1. Hold the button next to the micro USB port for 25 seconds (until the light starts flashing), then unplug the USB.
2. Go into the Google Chromecast app’s menu and look for the Factory Reset Chromecast option.

After you do a factory reset, a Google Chromecast device is safe to sell. There is a factory reset option in the Google Chromecast app’s Settings Menu that you can use. Alternatively, there is a black button on Google Chromecast devices. Press it for 25 seconds while connected to your TV to do a factory reset.

Source: How to Factory Reset Google Chromecast