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A flash drive (also thumb drive, memory stick, and pen drive/pendrive) [1] [note 1] is a data storage device that includes flash memory with an integrated USB interface. A typical USB drive is removable, rewritable, and smaller than an optical disc , and usually weighs less than 30 g (1 oz).
Toshiba also used an eight-layer 3D IC for their 32 GB THGBM flash package 📦 and in 2008. [58] In 2010, Toshiba used a 16-layer 3D IC for their 128 GB THGBM2 flash package, which was manufactured with 16 stacked 8 GB chips. [59] In the 2010s, 3D ICs came into widespread commercial use for NAND flash memory in mobile devices. [34]
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. They connect to a USB port [1] and function as a folder.
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When the system or device needs to read data from or write data to the flash memory, it will communicate with the flash memory controller. Simpler devices like SD cards and USB flash drives typically have a small number of flash memory die connected simultaneously. Operations are limited to the speed of the individual flash memory die.
Such storage devices may refer to removable media (e.g. punched paper, magnetic tape, floppy disk and optical disc), compact flash drives (USB flash drive and memory card), portable storage devices (external solid-state drive and enclosured hard disk drive), or network-attached storage.
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