In data storage, SSD stands for Solid State Drive, which differs fundamentally from HDD (Hard Disk Drive). SSDs use flash memory to store data, providing faster data access and improved durability due to the absence of moving parts. In contrast, HDDs rely on mechanical components, making them slower and more susceptible to physical damage. SSDs offer advantages in speed, energy efficiency, and robustness, which has led to their increasing adoption in modern computing, particularly in laptops and servers.