They are really small and lightweight. Using flash memory technology to store data in a digital format, SD cards are also non-volatile flash memory cards, meaning they don’t erase the data on them even after power is removed. The standard was developed in 1999 by a joint effort between SanDisk, Panasonic, and Toshiba.
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SD cards are primarily used to store data including photos, videos, music, and documents. On the basis of the physical size of the card, there are three broad categories of SD cards.
Standard SD cards: These are the original size of the SD cards and are the largest of all types. These are typically used in digital cameras.
MiniSD: These are a size smaller than the standard ones and are primarily used in portable music players and sometimes in a few odd varieties of mobile phones as well.
MicroSD: This is the smallest kind of all SD card and is primarily used in smartphones, tablets, and other small portable devices.
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Atreya Raghavan
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