In my case, all the files have been created via API can be retrieved, however the created file in a specific folder in google drive itself cannot be retrieved.
Example:
I have a folder named "Test". Now the user manually uploads or creates a file called "test.txt" in "Test" folder. The problem is I cannot retrieved the file created because it is created manually not using the API.
I have already use the https://www.googleapis.com/auth/drive which I have read in stackoverflow. But still cannot.
Any help would be appreciated.