I came to this thread after recently upgrading my DAP to an Android 12-based Hiby R4. After being concerned that I’d run into the same outcome, I was able to resolve this with System > Developer Options > Force Allow Apps on External.
The exact steps I followed are:
- Insert empty SD card (512GB) into device
- In Settings > Storage > SD card, select “Format as internal”
- Install Roon ARC from the Google Play store
- Navigate back to Settings > Apps > Roon ARC > Storage Used, select SD card
- When I Download music via Roon ARC, it is now stored to the SD card
It’s been a day or so of high usage and it’s working as intended.
Note: I saw other reports of app instability with Roon ARC when forced onto an external storage device, but that has not been my experience.