Despite your best effort, accidents happen, losing a MacBook or seeing your Mac simply die for no reason. You can take the sting out of any mishap if you have a backup. Much like flossing, backing up ...
an external drive to recover with connotes a bootable drive, while a backup drive is just formatted partition(s). effectively, you need to build an OS disk with recovery tools, in order to have a ...
The worst-case scenario has befallen even the most careful computer user: a coffee mug spills on your laptop or an update wipes all your files and photos. Despite your best effort, accidents happen.