what i got so far

app/src/main/java/xyz/quaver/pupil/Pupil.kt

@@ -23,6 +23,7 @@ import android.app.Notification
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.content.Context
+import android.content.Intent
 import android.os.Build
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.content.ContextCompat
@@ -38,6 +39,7 @@ import kotlinx.coroutines.launch
 import okhttp3.Interceptor
 import okhttp3.OkHttpClient
 import okhttp3.Response
+import xyz.quaver.io.FileX
 import xyz.quaver.pupil.util.*
 import xyz.quaver.setClient
 import java.io.File
@@ -91,11 +93,11 @@ class Pupil : Application() {
 
         try {
             Preferences.get<String>("download_folder").also {
-                if (!File(it).canWrite())
+                if (!FileX(this, it).canWrite())
                     throw Exception()
             }
         } catch (e: Exception) {
-            Preferences.remove("dl_location")
+            Preferences.remove("download_folder")
         }
 
         histories = GalleryList(File(ContextCompat.getDataDir(this), "histories.json"))