![]() When buying an SD card, you have to consider three things: the physical size, the storage capacity, and the speed at which it can write data. For this sort of application, you'll probably need a fast card. ![]() If you want to shoot high-definition videos, keeping up can be a challenge. ![]() However, if you want to shoot a rapid sequence of photos, the card has to be fast enough to keep up. The result is the chaos we enjoy today.įor standard applications like single-shot compact cameras, it doesn't matter which class of SD card you buy, as long as it's compatible. But as usage grew, people began to need different speeds and sizes. Secure digital (SD) cards started out as a wonderfully simple Flash storage format, and quickly replaced CompactFlash, MMC and other types of card. Does it matter which class of card is used? We use microSD cards in compact cameras, Samsung and Nokia Lumia smartphones, and for storing and saving games in our original Wii. Reading an article by the organisation that sets and regulates SD card performance standards ( Greater Performance Choice) made me even more confused. I was shopping online for some new microSD cards and got thoroughly confused by the different classes/speeds.
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