There were two micro SD cards, one of which is 64G (grade 10), meeting the DVR's specifications. It has been set up and formatted, however a minute into recording, the camera indicates delayed recording, followed by a recording buffer overflow error, after which the video ends. The situation is repeated after the card has been formatted. I made the decision to buy Kingston (Canvas Select line) since it was the fastest among those offered on our market in terms of price and features. The manufacturer also offers a lifetime warranty, but obviously not for us yet. However, this also had an impact on the decision. The outcome is that everything runs smoothly.
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