In Classic Drive the method to add files to multiple folders required the use of the Ctrl Key with the Move function.
See the previous tip: The difference between Add and Move
In the New Drive this is implemented via a different method.
Adding a file to multiple folders
Working in a given folder we can locate the file we wish to add to another folder.
You can work on multiple files at the same time by selecting them together and following the Add To method.
Files can have many multiple locations (not just 2).
As with any advanced method this needs to be used carefully to avoid confusion.
With the Add to method there is still only a single version of the file so a deletion from any of its locations results in a deleted file “everywhere”.
To remove a file from a single location click on the X next to that location in the details view.