Video Guide to SD Cards
What Type – SD or microSD?
There are two physical sizes, SD and microSD. We recommend the microSD size even if your camera takes the larger full size SD card. Nearly all microSD cards include a full SD adapter so it’ll work with your current camera. When you change cameras you won’t have to buy a new card as the vast majority of dash cameras use microSD cards.
How Much Space?Next the amount of space. 32GB is the sweet spot for value. That’s 3-4 hours of 1080P recording which is more than enough for most drivers. Any less and you pay more money per gigabyte and save only a few dollars.
What Speed Rating?Look for: “Class 10” OR “UHS-I U1” rated microSD card. Slower cards can cause recording problems. See the symbols below for what to look for. Some cards have both ratings and that’s OK.
Speed ClassThe speed class symbol represents the minimum writing speed to the SD card in megabytes per second. Class 10 is the highest speed at 10 megabytes/second.
UHS Bus & ClassUHS improves on Class 10 cards by providing a faster interface for compatible devices. Most dash cameras don’t use the UHS interface but UHS cards will still work properly. There are two separate ratings, the Bus & Class. The UHS Bus is the transfer speed and has two tiers: UHS-I (50MB/S) and UHS-II (156 or 312 MB/S). The UHS Speed Class also has two speeds minimum writing speeds: U1 (10 MB/S) and U3 (30 MB/S)
Faster SD Speeds Won’t Improve PerformanceCurrently 1440P is the largest resolution and only requires 1/3rd of the max transfer rate of Class 10 cards. Only 4K recording at very high bitrates will need an upgrade to U3 or UHS-II and that’s years away.
Picking the Right Memory TypeGet MLC memory cards for long term reliability.
One of the most important but least known characteristics of SD cards is the NAND type. The NAND type describes how the physical cells that store information were constructed.