The main advantage of using solid-state drives (SSDs) over traditional hard disk drives (HDDs) is their superior speed and performance. SSDs provide faster data access times and quicker boot-up and load times for applications because they have no moving parts, unlike HDDs, which rely on spinning disks and mechanical arms. This speed advantage translates into improved responsiveness and efficiency in tasks like file transfers, gaming, and professional applications. Additionally, SSDs are more durable and consume less power, making them an appealing option for both personal devices and enterprise solutions.