Understanding the Speed Class: What Does the '3' Mean on a Micro SD Card?

Learn what the '3' signifies on a micro SD card and its importance for high-speed data transfer and video recording.

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The '3' on a micro SD card indicates its speed class. Specifically, it signifies a UHS (Ultra High Speed) Speed Class 3 (U3), which means the card is capable of maintaining a minimum write speed of 30 MB/s. This is particularly important for recording and handling high-definition video streams, like 4K video recording. Ensuring you have the appropriate speed class can significantly enhance performance for video recording and other intensive data tasks.

FAQs & Answers

  1. What is UHS Speed Class 3? UHS Speed Class 3, indicated by a '3' on micro SD cards, supports a minimum write speed of 30 MB/s, essential for high-resolution video recording.
  2. Why is speed class important for video recording? The speed class determines if the card can handle the data recording rate of high-definition videos, especially for formats like 4K.
  3. How do I choose the right micro SD card for my camera? Select a card with a suitable speed class (like UHS Speed Class 3) based on the recording resolution and the video's bitrate requirements.