DO NOT click the Initialize button unless it’s a new drive or you have recovered data from it. So, you end up losing your data.Īlso, when you connect a corrupt or unreadable external storage drive to your Mac, macOS will prompt you to initialize the disk. When your Mac storage drive has stored data on it, and you accidentally erase the drive in a new file system format, macOS removes all references to the data. Perfecting the storage drive in case Disk Utility fails to repair itīut storage drive formatting involves certain risks.Changing the file system format for cross-compatibility.Resolving corruption or unreadable error of the storage drive.Preparing the startup disk to reinstall macOS.You may even need to manually format your internal or external Mac storage drive or volume in the compatible file system. MS-DOS (FAT) or exFAT format to make your external storage drive cross-compatible with both macOS and WindowsĪ new Mac with its built-in solid-state drive or hard drive comes pre-formatted with a file system that contains the macOS.
#How to format a external drive without losing data mac os
Mac OS Extended format for macOS Sierra 10.12 or earlier.APFS format for macOS Big Sur 11, Catalina 10.15, or Mojave 10.14.Different file system formats exist for different operating systems. Recover Data Lost due to Accidental FormattingĪn internal or external Mac storage drive requires compatible files system format to be accessible in macOS. Format a Mac External Hard Drive Using TerminalĤ. Format the Startup Disk in macOS Recovery Modeģ. Back Up Your Mac Hard Drive before FormattingĢ. Download the free-to-try Mac data recovery software to recover your erased hard drive data. The blog post shares a few safe methods to format your Mac hard drive in the desired file system format, without the risk of any data loss.
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