bob2k2 wrote:
i have already tried this. These instructions are for a “folder” on a hard drive like another Mac -it would work if you could place a folder on a Time Machine back up drive.
Folder, drive, directory, mount point…they're all the same. You can select the whole drive as the "folder."
My Mac external hard drive has been initialized as a Time Machine backup and does not show up as a “folder” and you cannot add a folder to a Time Machine backup volume.
That's a whole different issue. Once you attach a drive to Time Machine, that's all it will be until you remove it from Time Machine and erase it. If you want to use it for network backups along with your Mac backup (directly attached), you will need to add an APFS Volume to the drive after you Erase it. You can then assign one Volume to the directly attached Mac and use the other volume for a network backup.
we both realized there’s no folder on an initialized Time Machine back up drive you can’t follow the instructions any further because of this.
The lack of a folder is not the problem as I explained above.