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Cannot back up to external hard-drive

hi all


Can anyone help me understand how to fix this error:


There was an error preparing the Time Machine backup disk “Seagate 1TB Slim”.

The disk is already reverting


I am not very technical when it comes to the OS but I can follow directions on how to change settings as needed. I have tried googling this error and can't find anything that I understand or that mentions 'reverting'


thank you....

MacBook, macOS 10.14

Posted on Apr 8, 2019 2:14 AM

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Question marked as Best reply

Posted on Apr 8, 2019 3:25 PM

Well, several people gave up after two weeks & reformatted the drive & started all over, I'm surmising without knowing for certain, that those excruciating cases would never have finished.


7 replies

Cannot back up to external hard-drive

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