I have a number of files with some extension and I have an app that can open the files - it is not the default format of this app, but it can import and display it.
At the moment when I attach USB stick with these files File Manager display error message "This file cannot be opened".
I need to open the app, choose "File -> Import" navigate through fairly complex directory structure and only than I can see the content.
How to create file association so I can immediately open the file from File Manager?