A portable hard drive is a compact storage device that allows users to save and transfer large amounts of data easily. It connects to computers and other devices via USB or other interfaces, making it convenient for backing up files, photos, and videos. These drives come in various storage capacities, typically ranging from 500 GB to several terabytes. Portable hard drives are popular among students, professionals, and anyone needing extra storage on the go. They are lightweight and often designed to be durable, protecting the data inside from physical damage. Many users rely on them for data security and easy access to important files, especially when traveling.