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Open Disk Utility Go to Macintosh HD Applications >Utilities> Disk Utility |
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Pick the drive you want to reformat |
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Click Erase |
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Choose the Volume Format: as APFS Name the drive then click Erase in the lower right corner to erase the drive |
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You can also use Format: Mac OS Extended (Journaled) Scheme: GUID Partition Map Then Click Erase |
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How to format a hard drive in Windows.
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