Original post by: Vishal Chaudhary

Text:

Hi, you can still run Disk Utility's First Aid on your unmounted drive. To do so, select your drive from the Disk Utility left corner and press First-Aid. Wait for the process completion and the Disk utility will let you know if your drive needs repair or formatting. P.S. backup your data and then erase the drive with MacOS Journaled.

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open