Fair comment Jake - I use it for compactness (is that a word?!) on my laptop, and have found they don’t interfere with each other, but yes, if the whole drive fails ???Theoretically you could do that, but if that backup drive fails, you lose both backups. I have had that happen before, which is why I keep multiple drives, one for TM one for clones. Drives are cheap. Don't pinch pennies on backup.