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About SD (Secure Digital)
SD (Secure Digital) is a prominent type of memory card. Memory cards depend on Flash memory and are used for solid sate storage, their basic purpose for existing being a modest method to store or move information among PCs and other devices.
SD cards are about a similar size as MMC but somehow thicker. They give more speed than MMC to the casuing a higher power consumtion. SD cards additionally give an equipment lock that can shield the stored data from being deleted.