Why do I get message: Time Machine couldn’t complete the backup to “WD 4TB Time Machine”.
iMac running Mac OS Big Sur 11.6. I used this drive for Time Machine for months then suddenly got the message in the title. Disk Utility failed to fix it. I bought a new external drive. It worked twice, then got the same message. Disk Utility failed to fix it. I used Disk Utility to erase the frist drive. Time Machine worked once. Next time I got the same message. Disk Utility failed to fix it. I have not seen any likely solutions posted so far. Help?
iMac 27″, macOS 11.2