One other thing to note - MobileSheets only scans the library once when the application starts. It's not rescanning for changes while the app is running as I didn't want to have processing in the background that would drain the battery for little gain. I could try to scan when the connection to the companion app is established, but the scanning may take a while, so then you wouldn't see any of the files on the device for as long as it takes for the scan to complete.
Mike
Mike