The main advantage of using a solid-state drive (SSD) over a traditional hard drive (HDD) is speed. SSDs utilize flash memory technology, allowing for significantly faster data access and retrieval times compared to HDDs, which rely on spinning disks. This speed enhancement increases overall system performance, reduces boot and load times, and contributes to better efficiency in multitasking scenarios. Additionally, SSDs are typically more durable, consuming less power, and generating less heat compared to HDDs.