But what if you've backed up your data via an external drive ... at the bottom of your screen and click Create and Format Hard Disk Partitions when it pops up in the menu. This will open Disk ...

External hard drives are handy for storage and ... and using built-in tools like Disk Management or Disk Utility can help fix access to your drive.

So, if there’s any even of misfortune, you don’t end up losing your data but can restore it fully from Repair Disc or an external hard drive. That said, things do not always work as expected.