Flash drive

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Assortment of flash drives

A flash drive is a portable computer drive that uses flash memory. Flash drives are the larger memory modules consisting of a number of flash chips. A flash chip is used to read the contents of a single cell, but it can write entire block of cells.

Specific flash drive types[]

Memory cards:

• Flash memory-based CompactFlash (CF) card (including CFast card) and XQD card (Note: some other types of CF and XQD card are not flash memory-based)
• Memory Stick (MS)
• MultiMediaCard (MMC)
• Secure Digital card (SD, SDHC, SDXC)
• SmartMedia card (SM)
• xD-Picture Card (xD)

Other:

• Solid-state drive, SSD, using flash memory (a few SSDs use DRAM or MRAM)
• USB flash drive (UFD)

See also[]

• Flash memory
• Comparison of memory cards

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