Backup-ing to Time Machine: "The backup disk image could not be created."
I just upgraded to a MacBook Pro 2021 M1 Pro with Sonoma. On my previous MBP mid 2015 I have been running backups through my Airport Extreme to a USB hard drive. That always worked great. Since I switched to my new MBP I am getting this error message:
Time Machine couldn't back up to [name airport extreme]
When I click on "details" I am getting these messages:
Time Machine couldn’t complete the backup to [name backup]
The backup disk image could not be created.
I checked the following things already:
- Connecting the USB hard drive straight to my MBP and running the backup. That worked.
- Erasing the hard drive and setting it up to AFPS and Mac OS Extended.
- Then when I connect the drive to the Airport Extreme, I am getting the error message again.
What am I missing?
AirPort Extreme