Telling Lightroom about a replacement external Hard Drive

[#1]

My lightroom external hard drive failed. The duplicate I had been keeping using Super DUp is not a real copy, but I have 2 options: I have it backed up in the cloud with Carbonite, and Datasavers say they can save the data for too much money.   I am making a new external HD from the cloud copy, but I don't think LR will see it as if it was the originalext HD. Do I name the new drive the same or differently from the original?   How to I expain to LR there is a new path to a new External HD  to the LR folder with subfolders and about 80 GB of images?  

Thank You

[#2]

My lightroom external hard drive failed. The duplicate I had been keeping using Super DUp is not a real copy, but I have 2 options: I have it backed up in the cloud with Carbonite, and Datasavers say they can save the data for too much money.   I am making a new external HD from the cloud copy, but I don't think LR will see it as if it was the originalext HD. Do I name the new drive the same or differently from the original?   How to I expain to LR there is a new path to a new External HD  to the LR folder with subfolders and about 80 GB of images?  

Thank You

[#3]

1. Hope you also have a backup of photos, or if lucky, they are on a different drive .

2. Might be easier to just fix after the fact, see

http://www.computer-darkroom.com/lr2_find_folder/find-folder.htm

https://www.lightroomqueen.com/how-move-lightroom-to-new-computer/

[#4]

As long as you restore the images to the same folder structure that was originally used, you will just need to tell LR where the new folder tree is:

In the Library, Folders panel, right-click on the top-most missing folder "?", select "find missing", navigate to the same folder on the new drive. LR will auto-find all the subfolders and images under that folder. Repeat as needed.