This is Google Apps Script library for copying folder on Google Drive.
I have sometimes the situation that it is required to back up the folder on Google Drive to Google Drive. But unfortunately, the method of
makeCopy() of Class File and the method of
Files: copy of Drive API cannot be used for directly copying the folder on Google Drive. So I created this as a library. This library can copy the folder on Google Drive. All files in the folder can be copied to Google Drive with keeping the folder structure. When there are the files with newer modified time in the source folder than those in the destination folder, the files in the destination folder are overwritten by the newer files in the source folder. Also, in this library, the folders in the shared Drive and the publicly shared folders can be used as the source and destination folder.
Library’s project key
You can see the detail information here https://github.com/tanaikech/CopyFolder