How to install a file through iFile (iPhone jailbreak program)?

I've been trying to install a file on my iPhone through iFile for the past 4 hours or so and I can't figure out how to do it. Ever video I've seen says there's an install button when you tap the file but when I do it all I get is the option to open it in Google Drive or Logmein which is an app that lets me control my computer from my phone and obviously won't be any help. Is there something I need to install or can that specific file I'm trying to install just not be installed.

You can do it by using usb and your iphone and transfer through iFile