Why do I see so many main HD's on the left of Finder?

[blackxacto]

I have 4 backups of my main HD: TimeMachine and 3 external HDs. See the Finder image I attached. Why does Finder display the name of the external HD, then show again a clone image? What did I turn on to get double display of the externals?

 

[Taz Mangus]

Open the Disk Utility app in Applications->Utilities folder. Click on View->Show All Devices. Post a picture of what is shown.

 

[LuisN]

You can remove disks from the lateral bar by right clicking over it's icon and select remove from the lateral bar. It won't erase the disks

 

[xgman]

You've just dragged shortcuts to the sidebar inadvertently. just remove some,

 

[blackxacto]

This is my view in Disk Utility, I don't think the items in left col Finder are alias's. Maybe I'm wrong.

 

[Taz Mangus]

Unmount and physically disconnect each of the external hard drives. Perform an SMC reset. That should clean up the duplicate HDs on the sidebar.

Reset the SMC of your Mac - Apple Support

The SMC is responsible for managing power on your Mac. Resetting it can resolve certain uncommon issues related to power or thermal management.

support.apple.com