"Clic or drag and drop files here to upload them" has no advanced option for exiting files
in document tool, when they want to add a document, teachers are very found of the "Clic or drag and drop files here to upload them" feature.
But there isn't advanced option in this feature like in the simple document upload for the action to do if file already exists.
[ ] Uncompress zip
If file exists:
[ ] Do nothing
[ ] Overwrite the existing file
[ ] Rename the uploaded file if it exists
And after upload file(s) when don't know if existing file has been overwrited or not