Upload File 
You can use this field, When you want to upload file through web form. It also works for Google Forms.
Install Helper Program 
Following Helper Program needs to be downloaded and installed on your computer, It is required to automatically select given file(s) from your computer.
Field Options 
Check for Helper Program 
To check, If Helper Program is installed and working properly.

Enter Base Path 
Specify Base Folder for File Upload, (a folder which container the files which you want to upload through).

Other Options 
- Multiple File Upload
 - Upload all files in a folder
 - First check that the file exists in the PC, then select the file.
 - Set the uploading browser window title name.