The recorder files store recordings captured by the device in Manual control mode (without connecting to the app). When you connect the app, you have the option to sync the new recording to the App local files, which will then be displayed on the first page of the app.
The App local files, on the other hand, contain recordings made using the device in the app control mode. The recording is synchronized in real-time within the app. Upon completing the recording, you can easily locate it on the first page of the app. Additionally, the recording is stored in the recorder files as well.