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Solid State Drive(SDD)

A solid-state drive is a solid-state storage device that uses integrated circuit assemblies to store data persistently, typically using flash memory, and functioning as secondary storage in the hierarchy of computer storage.

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What Is an SD Card?

In general, memory cards are thin, light data storage devices. Their particular form factor makes them ideal as removable storage for small devices. You can pop a memory card into your camera, take enough pictures to fill it up, and then pop the card out, empty out its contents, and slip it back in.

An SD card might just look like one giant chip to a layperson, but the outside is actually a shell. Crack open the shell, and you’ll see something very similar to the inside of a typical USB flash drive. You will find one or more flash memory chips, along with a controller chip soldered to a printed circuit board. The NAND flash memory chip stores all of your data. When you plug your SD card into your computer, camera, or another device, data flows to and from the memory chip, organized and regulated by the controller chip. The controller keeps track of any bad blocks on the NAND chip as one of its many duties.