A Hard Disk Drive (HDD) is a type of data storage device that uses spinning disks coated with magnetic material to read and write data. It is commonly used in computers and laptops to store operating systems, applications, and files. HDDs are known for their large storage capacities and relatively low cost compared to other storage options. HDDs operate by moving a read/write head across the spinning disks to access data. They are slower than Solid State Drives (SSDs), which use flash memory, but they remain popular for bulk storage needs. HDDs are essential components in many electronic devices, including servers and gaming consoles.