Memory cards are loaded with jargon. Here's how to read it and get the right one

Popular Science | 3/13/2018 | Staff
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Write speed measures the card’s ability to save data to the memory modules inside the card. It is expressed differently because it addresses different demands. Instead of using max speed, companies indicate the minimum write speed. The difference stems from the fact that if a card’s write speed were to drop too low, even for a short amount of time, it could interrupt a camera’s ability to record video footage to the card. This has become increasingly important as video resolutions and frame rates have climbed in recent years.

The most common method to express write speed used to be a simple class number, which looks like a number inside a circle. That scale stops at 10, which means it has a minimum write speed of 10MB/s. For 4K video,...
(Excerpt) Read more at: Popular Science
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