


Once you have found the proper drive to erase, just copy its identifier so you can use it for the next command. You can back to another drive, or use a cloud storage service like, Google Drive, iCloud, OneDrive, or Dropbox. Start off by running the following command in the command line: Diskutil list This is going to list all the mounted drives on your Mac. Wait for the drive to format then select OK to finish the process.

Because formatting the drive will delete all of your data, make a backup of anything you want to keep. If the File system isn't listed as FAT32, click on the drop-down menu and choose it.The program icon looks like this: Select the external drive you want to format on the left hand side of the window. If you have specific instructions to use FAT32 and your drive is larger than 2GB, you'll need a third-party tool to format it as FAT32-continue with this method. How to Reformat on Mac: Open Disk Utility.If your drive is larger than 2TB and you just want to use it to share files between multiple modern operating systems (Windows 8 and later, macOS X 10.6.6 and later), use this method instead, and be sure to select exFAT as the file system type.If your drive is larger or you need to work with big files, it's better to use exFAT, which has almost identical compatibility. The main difference is that you can't work with files larger than 4GB on FAT32, nor can it work with drives larger than 2TB. ExFAT, the successor to FAT32, also works on Windows, macOS, Linux, and other devices.
