So I have a Google Chromecast that I'm gonna sell tomorrow because I don't use it enough. My question is: Do I need to do anything before selling it? Is there any personal data stored on it? Do I need to reset it so the other person won't know my WiFi or Netflix password?
I believe the chromecast will store information from your router in order to connect. Either way, it's never a bad idea to reset electronics before selling them.
There are two ways to reset it:
Hold the button next to the micro usb port for 25 seconds, until the light starts flashing, then unplug usb
Go into the menu of the chromecast app and there should be a "factory reset chromecast" option
After you factory reset the Chromecast it is safe to sell. On the settings menu for Chromecast there is a factory reset button. Alternatively, there is a black button on the Chromecast. Press it for 25 seconds while connected to the TV to factory reset.