My DVR is working again! I had three DVRs and they all stopped working properly after two months. That seemed odd until I read a comment from a user saying that most micro SDs aren't fast enough. I used the "fast" class 10 ultra which experts say is great for this application. You don't! Pay a few dollars more for Extreme PRO. It's worth it. Write speed is the most important aspect of the card and it is undoubtedly superior to ANY Micro SD on the market. This is even faster than the new generation of "V" chips. My videos look better and my cameras keep working. I installed one of these in my GoPro and got much better quality videos and no longer have to wait for downloads. Another piece of advice I heard from an expert was that many products that use micro SD work better with 32GB or less. I know my 64GB dash cam wouldn't even turn on. Advice only.
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