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How Do I Correctly Format External Hard Drive for Time Machine?

I am having a lot of difficulty with getting an external hard drive to work for backing up my laptop with Time Machine.


I am running macOS 12.3.1 Monterey on a 2021 MacBook Pro that uses an Apple M1Max chip.


The external hard drive is a LaCie 5TB Rugged that connects with USB-C.


I have used Disk Utility to erase the hard drive and reformat it to AFPS. When I add the disk to Time Machine and attempt to begin backup I get the Red i Info that says, "Time Machine couldn’t complete the backup to “RoadTMBkup”...There were no disks found to back up...


I repeated the process using Disk Utility to again erase the LaCie hard drive and reformat it to Mac OS Extended Journaled. Same result.


Would appreciate any help.

MacBook Pro (2020 and later)

Posted on Apr 8, 2022 3:25 AM

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Question marked as Top-ranking reply

Posted on Apr 8, 2022 4:32 AM

Erase and reformat a storage device in Disk Utility on Mac



refer to below



6 replies

How Do I Correctly Format External Hard Drive for Time Machine?

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