A computer drive is a device used to store and retrieve digital information. The most common types are hard disk drives (HDDs) and solid-state drives (SSDs). HDDs use spinning disks to read and write data, while SSDs use flash memory, making them faster and more durable. Drives can be internal, located inside the computer, or external, connected via USB or other ports. They come in various capacities, allowing users to store everything from documents to large media files. Properly managing and backing up data on these drives is essential for data security and accessibility.