permission denied

[cnnt13]

Describe the bug
when i try to extract some apk, it says " pls goto settings-more app management and enable "file"
despite that i already enabled "read app list" and "read/write device storage" for kanade

Smartphone (please complete the following information):

• Device: Xiaomi6
• OS: [e.g. MIUI 9.2

Additional context
Add any other context about the problem here.