How to Move Pictures to an External Hard Drive
External hard drives are ideal storage devices because they allow you to back up files or transfer them from one computer to another. Pictures are large files that consume hard drive space and memory, so storing them on your external hard drive not only backs up the files in case your computer crashes, it also frees up memory and hard drive space.
Connect your external hard drive to your computer's USB or FireWire ports using the cable that came with your storage device.
Double-click "My Computer" or "Computer" on the desktop if you are using a Windows operating system. Locate your external hard drive's icon in the "Drives" section and double-click it to launch the hard drive's window. If you are using a Mac, locate your external hard drive's icon on the desktop and double-click it to launch the drive's window.
Locate your pictures from the folder you saved them in and drag them into the external hard drive's window. Alternatively, you can right-click the pictures and click "Copy," then right-click the external hard drive's window and click "Paste."
Close the external hard drive window and double-click the "Safely Remove Hardware" icon on the system tray. Click your external hard drive in the hardware window and click "Stop." If you are using a Mac, right-click your external hard drive's icon on the desktop and click "Eject." Disconnect your external hard drive from your computer.