Time Machine: Files can’t be copied onto the backup disk because it is read-only
Ive received the following error from Time Machine:
Files can’t be copied onto the backup disk because it is read-only. You may need to repair or erase the disk using Disk Utility. If the disk can’t be repaired, select a different disk for backups.
Can someone please suggest a fix for this so I can continue with my hourly backup? Does this mean I would need to erase my backup disk and start over again?
iMac 27" 5K, macOS 10.15