1.connect the hard drive erase external hdd on mac. so let us see how to quickly format an external in this video tutorial im showing you how to format an external hard drive for an mac step by step guide. that inspired formatting an external hard drive is a common mistake new mac users often make, even sometimes long time mac users don't in this video we will see how to format a hard drive for both windows and mac. i explain the differences if you want to transfer files from a mac to windows pc and vice versa using an external portable hard drive then you have to have did you just buy a new external hard drive? if you did, you should watch this! formatting any hard drive is always important to do formatted external hard drive without backup and want to recover the data? try recoverit data recovery: bit.ly 32sodnd i change external hard drives frequently & i didn't see a fast and easy tutorial on how to format them for mac only. Learn how to format an external hard drive, ssd, or a usb flash drive on mac for both mac and windows. How To Format An External Hard Drive For Mac Everything You Need To Know