reformatting an external drive to non-case sensitive

I'm trying to set up Carbon Copy Cloner on a drive that was previously backing up with Time Machine. I've added a second volume to the drive, but the drive is/was somehow set to case sensitive which apparently is bad. It was previously used on a Windows machine :^ \ I can't reformat the drive or even find a way to reformat it. I'm fine with losing all data on the 10Tb drive, which has incomplete backups via TimeMachine, which I apparently also can't delete. grrr How can I reformat this drive and start fresh with zero data and non-case sensitive APFS formatting? Thank you... t

Windows, Windows 6

Posted on Nov 16, 2023 6:46 AM

Top-ranking reply

D.I. Johnson

Level 7

32,315 points

Posted on Nov 16, 2023 6:53 AM

Erase and reformat a storage device in Disk Utility on Mac - Apple Support

You may need to click View > Show All Devices in Disk Utility so that you can select the device and not just the partitions (indented volumes listed in the sidebar).

Also, if this is an APFS formatted drive, you may also need to unmount and/or delete existing volumes before you can reformat the device... though I'm unclear on this point.

View in context

reformatting an external drive to non-case sensitive

Similar questions