Currently if I want to store a specific file across multiple folders, I have to upload that file and then copy it into each folder*.
If I make a change to that file, I have to reupload the file again and copy to each folder again (plus I have to navigate to each folder first to delete the old file so it doesnt make a sequential copy).
So my suggestion is - allow us to upload a single file and then create a placeholder/link to that file within multiple folders. That way we only have to update this "Master File" once and all instances will be updated.
*I could also upload the same file to each folder rather than copy but if the file is a large file it's sometimes quicker to copy the file already uploaded.