You can copy files in your drive.
How to copy a file:
Using action bar button
Select the checkbox of the file you want to copy in My Drive file list.
Click the Copy button from the action bar.
The selected file will be duplicated, and the duplicated file will have '-copy' appended to the original name.
Using mouse right button
Select the file to copy in My Drive file list.
Click the mouse right button and select the Copy menu.
The selected file will be duplicated, and the duplicated file will have '-copy' appended to the original name.
Note:
The duplicated file will be created in the same location as the original file.