A portable hard drive is a compact storage device that allows users to save and transfer large amounts of data easily. These drives connect to computers and other devices via USB or other interfaces, making them convenient for backing up files, sharing data, or expanding storage capacity. They come in various storage sizes, typically ranging from 500 GB to several terabytes. Portable hard drives are often used by individuals and businesses alike for their versatility and portability. They are ideal for storing documents, photos, videos, and software, providing a reliable way to keep important information accessible while on the go.