Make sure you tick the boxes next to External disks and Hard disks.
The recovery partition is helpful in extreme cases where you might need to reinstall a fresh copy of your latest macOS or OS X. Afterward, you simply need to follow this basic drill to reinstall macOS on your system. Reinstall macos not showing disk Disk Utility is NOT in a menu at the top left of the screen, but if you are booted to the macOS installer, will be on the Utilities window.
