How many video recordings will a 128GB card store?
How long is a piece of string? The number of clips a card will store depends on a number of factors: what 'per clip duration' duration you have set, the resolution, frame rate, etc. As a guide, however, a 128GB card will typically store around 25hrs of video at Full HD resolution. So providing you have fine tuned and optimised the motion sensor you could get weeks and weeks of recordings. You can also set the camera to automatically overwrite the oldest clips when the card gets full. There are a number of articles on this Knowledge Base which will help you to setup optimum recording conditions on your camera based on your needs.