The wrong memory card is the single most common reason a dash cam quietly stops recording, right when you need it most. Because a dash cam writes over its footage constantly, an ordinary card wears out fast and fails without warning. This guide explains what a high-endurance microSD card is, why it matters, and how to read the speed ratings so you buy a card that keeps up with 2K and 4K recording.

We also cover what size card to buy for your setup, from a single Full HD camera to a front, rear and parking-mode combination that eats through storage, plus where newer SSD storage fits in. Most importantly, we show you how to avoid fake cards and keep your footage safe. Read on for clear, Australian-focused advice, or browse the cameras and cards below and let the Guys match you to the right storage.