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Level 1

4 points

How do I backup my mac using time machine without deleting the existing files on my external hard drive?

Each time I try to back up my Mac to an external hard drive, it asks if it is okay to erase the backup disk.

MacBook Air 13", macOS 10.13

Posted on Apr 21, 2019 11:28 AM

Top-ranking reply

Level 10

81,763 points

Posted on Apr 21, 2019 11:41 AM

What format is the drive? Maybe Time Machine is asking to erase and format the drive to its required format.

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