I have a 256GB internal SSD and an external 500GB T5 with my iTunes/iPhoto/Steam libraries. I also have a 2TB external HDD I'm trying to use for time machine... except that only the 256GB internal is being backed up. The external SSD is shown in the 'exclude from backup list', where it is grayed out and can't be removed. Any idea on why the Samsung T5 is persistently excluded from backup and how I can make it included? Or does anyone have a preferred alternative method for backing up a secondary drive?