I want to use time machine to backup an external drive (holding photo library). How do I remove it from the list of excluded drives in time machine options?
Time machine appears to ignore external drives unless you remove them from the excluded list (fair enough). But my drive is grayed out in the Options dialog and so I cannot do that.
Do I need to re-format my drive, copy the photo library back onto it, then set up time machine for backup by removing it from the excluded list?
If so, what format should I choose?
Mac mini, macOS 10.15