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 an entire block of cells. They connect to a USB port and function as a folder. They can also be encrypted for extra security.
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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