General Manager of macVolks, Inc.
Using a USB device is one of the easiest ways to backup and/or transfer files. To copy files to a USB device, connect your USB flash drive or external hard drive to your computer, locate the file you want to copy, then drag the file to the USB device. When you are ready to transfer that file to another system, connect your USB device to the other computer, click on the USB device icon, and drag the file to the other machine's desktop.
Chiara Corsaro
General Manager of macVolks, Inc.Try using Time Machine if you want to do a full system backup or restoration. Once configured, Time Machine will backup anything and everything that is on your computer automatically, each time you connect your external hard drive to your computer. If you use Time Machine, please make sure you get an external hard drive that is twice the size of your internal hard drive, as Time Machine backs up not just your data files (eg: photos, documents, desktop items, etc.), but also your programs, operating system, and settings.