Downloading to usb from firestick

Storage on firestick is small so I purchased an adapter to allow for a usb connection that would allow a movie download. I formatted the the usb from the firestick menu and started the movie in my IPTV app from the firestick app menu. My problem is I cannot find where the movie was downloaded. I cannot find it on the usb drive. Please outline the correct steps to do this.

What app are you using to download the movie?

IPTV smarters

I’m not familiar with Smarters unfortunately. There should be somewhere in the settings for you to choose a path or location to record to. In say TiViMate, for example, I can use System Picker. Maybe try a site search for “recording in Smarters” and see what ya come up with.