Tips: you have lots of Mac backup software to choose from, among which Time Machine, iCloud, and MacX MediaTrans are the best bets. Thus, data backup is a must in case of data loss. It's worth mentioning that formatting a hard drive on Mac will delete all current data stored on that drive. Many users followed instructions to format Mac hard drive but ended up deleting some important data that they couldn't get back any more. Things to do before formatting Mac hard drive
you are selling your Mac computer and formatting Mac startup disk drive to make it clean and new without any personal data and information on it.you plan to backup DVDs to Mac hard drive or store other files and need to format an external hard drive for macOS to extend storage space.
