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