If there is anyone out there who has an Android 11 device with a removable (micro) SD card, please test this APK and let me / us know if it works there too.
This APK was built on the AI2 test server (targetSdk = 30).
Try it especially on Android 11 devices with a → removable (micro) SD card. Please test it and tell us if it works there too.
The app lists and plays the MP3s on your device (if there is a removable SD card, it lists MP3s from there).