What is the main difference between SSD and HDD?

The main difference between SSD (Solid State Drive) and HDD (Hard Disk Drive) lies in the technology used for storage. SSDs utilize flash memory to store data, while HDDs rely on spinning magnetic disks to read and write data. Because SSDs have no moving parts, they can access and transfer data at significantly higher speeds compared to HDDs. This results in faster boot times, quicker file transfers, and overall improved performance when using applications.

Additionally, the construction of SSDs allows them to be more durable and resistant to physical shocks compared to HDDs, making them a preferable choice for portable devices. The design and technology of SSDs contribute to a range of benefits over HDDs in many use cases, thus reinforcing the correctness of the answer choice that highlights both their speed advantage and lack of moving parts.