Google Soporte para la Nest Cam​​ 

Thanks for asking, Manuel. While you can't add any additional storage to the Nest Cam, it has enough internal memory to store up to one hour of recorded events when they're offline. When your camera reconnects, locally stored video is uploaded to the cloud and removed from your camera's internal memory. Check out this guide for more details: https://support.google.com/googlenest/answer/9242083

No, you cannot add a memory chip to a Google Nest Cam, as these cameras use their own internal memory and do not have an SD card slot. However, new Nest Cams (set up with the Google Home app) can automatically store up to one hour of events on their internal memory during a Wi-Fi outage, and they will upload the clips to the cloud once the connection is restored. -Cryssie

Keep your camera secure and fully charged. Use the wired stand to place Nest Cam on a shelf so you don t have to worry about charging. Plug it in for features like 24/7 recording. https://www.verizon.com/products/google-nest-cam-stand/ -Natasha

The Nest Camera is sold separately, and it connected via a Wi-Fi connection provided by your router. -John