Clone Folders in Google Drive [Back-up Data to another Google Drive Account].

Do you ever wanted to duplicate a Folder Structure in Google drive !!
              or want to transfer all folders to an other account .

Although 'Make a copy' option is provided in context menu, to clone or duplicate single or multiple files at one in same folder as original. However, similar option is not provided to make a copy of folders with original files and  sub-folders structure.  It is essential feature currently missing in Google drive; more like a copy-paste command in windows explorer.

Depending on the file size, folder structure/hierarchy and limitations for manual renaming of 'copied' files, below given methods may be useful workarounds.

Use 'Make a Copy' Option 

This method has a limited application  in case, Folder does not have too much files  and no  sub-folders in it. As it involves manual renaming of all  'Copied' files to restore their original file names, It is too cumbersome.

Here's how to do it :

1. Share Folder <folder name>  in [Drive-A] to be copied to other google account [Drive-B].

2. Create a 'New folder' in [Drive-B] and name it  <folder name>.

3. Go to 'Shared with me' and open shared folder to select all files listed. Hit 'Make a Copy' given under right click context menu.

          [Note:  Notice the the owner of all copied files is [Drive-B].]

4. Use 'Move to ...' option to shift all copied content to  <folder name> created at Step-2.

5. Rename files to their original names manually by deleting the suffix 'copy of', if desired.

6. Revoke folder sharing as created in Step-1 to complete the whole process for folder cloning.

Using 'Backup and Sync' Desktop app by Google

I used this method to do the task for me for two main reasons. First, It is exactly same as a  'Copy & Paste' folder in traditional windows explorer. Other most important thing is that It preserves all original folder structure as well as filenames. Apart from that It safe, and secure way of doing that without using ant external script or Third-party apps. 

1. To start the process, download and Install latest version of 'Backup & Sync' by Google.
                                            https://www.google.com/drive/download/

2. After install, start application and sign in with existing google account from which 'desired folder/s' has to be copied.

3. Continuous backup is required for this task. Therefore, uncheck the boxes on next screen.

4.  Change google drive sync folder, if needed > Select 'Sync only these folders'. 
          Otherwise all content in google drive would be sync to local folder and may have huge data cost.

5.  Select 'desired folder' with all sub-folders and hit Start.

6.  Wait for Backup and Sync to sync desired folder and structure to the local folder.

7.  Use normal 'Copy and Paste' context menu and Make a Duplicate folder in same drive. Wait for 'Users-Copy' to sync.

 8.  Desired folder is now copied to same Google Drive Account.

Make a Duplicate Folder or Move to other Google Drive Account 

 It is exact same upto Step-6,  Disconnect the source drive account as shown below. Now, Desired folder including all files and sub-folders are  sync'd in local hard disk. 

[Note : Another way of doing it may be, to download a zip file of 'desired folder' directly from web interface of Google drive account [A]. Then, unzip it in same folder location as step-6].

Now, Repeat the same from Step-2 to Step-4. Do not select any folder here in Step -5. Wait for the sync to complete and check the status at web interface of Google Drive [B].

Apart from the methods above, some third party apps do it more conveniently through Google Sheets Add-ons or custom scripts,  but It is better to be safe on  personal data security.