There is no way to delete multiple document in the folder at the same time. We have to delete each document with a couple of additional click as like more -> more action -> move to trash. This is not reasonable. Even though we can not delete document in grid format view.
So I think this behavior have to be same in Files and Folders related with doing delete multiple docs at the same time.
The point of customer complain is the different menu of move to trash between file and folder side.
I mean there is "move to trash" menu selecting document in my file menu but there is no "move to trash" menu doing same thing in the folder menu.
In Files : attachment1
In Folders : attachment2