memory card enable mobile users easily to transport digital photos, music, or file to and from mobile devices and computers or other.Memory card is a removable flash memory device, usually no bigger than 1.5 inches in height or width, that you insert and remove from a slot in a computer, mobile device, or card reader/writer.
common types of memory cards include compactflash(CF), secure digital(SD), secure digital high capacity(SDHC), microSD,microSDHC,xD picture card, memory stick, and memory stick micro (M2).
depending on the device , manufacturers claim memory cards can last from 10 to 100 years.transfer rate range from about 1 MBps to 20 MBps or more, depending on the device.memory cards are quite expensive compared to other storage media with equivalent capasity.for example,the cost of a 16 GB CompactFlash card can be the same as a 640 GB external hard disk.
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