Why is a solid-state drive generally faster than a hard disk?

Correct answer: It has no moving mechanical parts

The governing concept is the difference between electronic flash storage and magnetic mechanical storage. An SSD stores data in flash memory and has no spinning platters or moving read-write heads, so it usually accesses data more quickly and with lower mechanical delay than an HDD. Therefore, option D is correct. SSDs still need power, can store many file types, and are storage devices rather than parts of RAM.