Note: If you intend to use Sentry’s local storage, it is recommended to insert an SD card prior to installing Sentry.
Slide down to remove Sentry’s base plate, then push back to remove the PIR module on the top. You should now see the SD card slot on the top of the camera body. Push the SD card all the way in with its metal strips facing towards the back of the doorbell, until you hear that it clicks into place. To remove the SD card, push the SD card in again and it should be ejected from the slot. After inserting the SD card, replace the PIR module.
You can also watch the installation video to locate the SD card slot.