![]() Memory cards vary by the speed of data processing, which is shown by digital symbols on them. The card has standard dimensions of 24×32×2.1 mm which gives enough space to place its own controller and memory chips in charge of writing and storing user data the chips use the principles of flash memory based on special programmable semiconductor technology.Īs the cards developed, the amount of their built-in memory increased and for today, it can be anything up to 128 TB. Memory cards are mostly used with portable electronic devices such as smartphones, digital cameras, electronic books, GPS navigators, some kinds of games consoles etc. An SD memory card (abbreviated from Secure Digital Memory Card) is a tiny mass storage device meant for repeated writing, storage and reading various digital information.
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