 The NAND type is found primarily in memory cards, USB flash drives, solid-state drives (those produced in 2009 or later), feature phones, smartphones and similar products, for general storage and transfer of data.NAND or NOR flash memory is also often used to store configuration data in numerous digital products, a task previously made possible by EEPROM or battery-powered static RAM.One key disadvantage of flash memory is that it can only endure a relatively small number of write cycles in a specific block.