1. Connect the hard drive with Usb cable to the Mac
2. Launch Disk Utility, located in Applications > Utilities
3, Locate the drive name from the left hand side of Disk Utility and click on it
4. Click on the “Erase” tab across the top
5. Next to “Format:” click the contextual menu and select “Mac OS Extended (Journaled)”
6. Name the drive if you want, the name can be changed at any point
7. Click the “Erase” button and confirm again on the next pop-up window
