TIME MACHINE FAILURE.

I have Mojave 10.15.7

An external 1.5 Lacie drive formatted correctly and connected through USB 3 to USB C adapter. The drive mounts. but time machine remains in "preparing" forever and then says backup failed. Have done all troubleshooting recommendations and still nothing. What gives? Extremely frustrated, Apple.

Posted on Oct 25, 2020 6:58 PM

Top-ranking reply

Kappy

Level 10

362,007 points

Posted on Oct 25, 2020 8:26 PM

Drive Partition and Format - El Capitan or Later

Open Disk Utility in the Utilities folder.
After Disk Utility loads select the drive (out-dented entry with the mfgr.'s ID and size) from the Device list.
Click on the Erase button in the Disk Utility toolbar. A panel should drop down.
In the drop down panel set the partition scheme to GUID. Set the Format type to Mac OS Extended (Journaled.)
Click on the Apply/Erase button and click on the Done button when it is activated.
Quit Disk Utility.

Try reconfiguring Time Machine® preferences, the run Time Machine® once again.

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TIME MACHINE FAILURE.

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