It's very likely flash memory or another form of it (with no moving parts, unlike hard drives) will replace hard drives in the future, with advancements in memory capacities and decreasing costs. The aspect of no moving parts allows greater portability, endurance to movement (that's why your iPod nano has a flash memory) and no 'mechanical failures'.
However, flash memory at the moment (as flash drives) is up against a wall in the area of memory. This might be overcome with 'sideways' development' or another form of better, non-mechanical memory.
That is simple as example USB flash memory, pen drives, memory cards.
Flash memory or SSD - Solid state drive
Solid state Flash drives USB Hard disks drives
USb Drives based on flash memory and other flash memory are not volatile. Volatile means erases or looses memory when shut off or disconnected.
No. Unlike hard drives, flash memory doesn't write data, it virtually stores it
Flash Memory Drives
USB memory keys or flash drives
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Flash drives primarily use NAND flash memory as their storage component. This type of non-volatile memory retains data even when power is turned off, making it ideal for portable storage. Additionally, flash drives contain a USB interface controller that manages data transfer between the flash memory and the host device.
Four types fo removal memory devices would be external hard drives, USB memory drives (flash drives), memory cards, and DVDs or CDs. Which of these devices you would choose to use would depend on your individual needs.
They are called flash drives.
In relation to what? They will become cheaper. USB pricing will remain the same, this would have no effect on the price of flash memory.