Unable to backup on external device. Does anyone know what this means?
MacBook Air
Question marked as
The error message is stating that there is not enough free space on your internal harddisk to do a backup.
Free up space on your mac first.
This has some helpful tips how to do that:
How to free up storage space on your Mac - Apple Support
The backup prosesss needs free space on the hdd to be able to backup.
Good luck!