I’m just here to provide links since you weren’t allowed. I haven’t fought this issue recently enough to answer in the little time I have right now.
@Danika_Dakika, I’m giving an @ for extra visibilty since your name’s recently present in the places I looked.
Link for context to this topic: Ankidroid-folder unavailable
The mention to do a parallel install: Ankidroid-folder unavailable - #17 by Danika_Dakika
Relevant instructions: Full Storage Access · ankidroid/Anki-Android Wiki · GitHub
Another mention to do a parallel install, but in a different topic: Android Directory is Inaccessible (version 2.17.6) - #2 by Danika_Dakika