An external hard drive is a device, exactly the same size as that of a book, that helps you save all of your apps and files. If you’re familiar with using the USB flash drive, external hard drives are just like them. But they are bigger in size with more storage capacity.

The key difference between a hard drive (HD) and an external hard drive (external HD) is that the external HD is portable and easy to carry. You can disconnect it at any time and take it with you, at your ease. No need to worry because you’ll not lose data inside.

These external drives attach/connect your PC with a USB cord, and you can easily copy your data to them as you do to other folders. Same as flash drives, you can attach your external HD to any laptop or PC, and copy your files.