My Time machine will not back up to my external backup disk because it is "read only". It was ok for years now it will not backup.
Do I have to erase the drive ?
iMac 21.5″, macOS 10.15
User profile for user:
jdo_apple
User level:
Community Specialist
Hello robertfrommickleton,
Thanks for that info and for choosing the Apple Support Communities. If we understand correctly, you are unable to use Time Machine to backup your Mac to a drive you have used in the past. To help with this, please see the relevant steps in this Apple resource for this situation, and then contact Apple directly if you need any further assistance.
If you can't back up or restore your Mac using Time Machine
Cheers!