My device has 64 GB of internal storage and it's nearly full. I can expand storage with a 256 GB microSD card. However, I don't like that everything stored on the SD card is freely accessible to every app with full storage permission and I would like a way to limit accessibility for at least some folders.
I've read some posts about formatting the SD card as internal storage and that it comes with a significant performance impact. Ideally, I'd like to combine internal storage in such a way that apps and processes run on the phone's internal storage for performance and the SD card is used as internal storage only to store media/documents for the permission system.
Is there a way to do something like that on an unrooted device running on Android 10?