diff --git a/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt b/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
index 8eca9aff..242f68bd 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
@@ -21,6 +21,7 @@ package xyz.quaver.pupil.ui
 import android.annotation.SuppressLint
 import android.content.Intent
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.text.InputType
 import android.text.util.Linkify
@@ -31,8 +32,8 @@ import android.view.animation.DecelerateInterpolator
 import android.widget.EditText
 import android.widget.TextView
 import androidx.appcompat.app.AlertDialog
-import androidx.appcompat.app.AppCompatDelegate
 import androidx.cardview.widget.CardView
+import androidx.core.content.ContextCompat
 import androidx.core.view.GravityCompat
 import androidx.core.view.ViewCompat
 import androidx.recyclerview.widget.RecyclerView
@@ -126,6 +127,21 @@ class MainActivity :
 
         checkUpdate(this)
 
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R &&
+            !Preferences["download_folder_ignore_warning", false] &&
+            ContextCompat.getExternalFilesDirs(this, null).map { Uri.fromFile(it).toString() }
+                .contains(Preferences["download_folder", ""])
+        ) {
+            AlertDialog.Builder(this)
+                .setTitle(R.string.warning)
+                .setMessage(R.string.unaccessible_download_folder)
+                .setPositiveButton(android.R.string.ok) { _, _ ->
+                    DownloadLocationDialogFragment().show(supportFragmentManager, "Download Location Dialog")
+                }.setNegativeButton(R.string.ignore) { _, _ ->
+                    Preferences["download_folder_ignore_warning"] = true
+                }.show()
+        }
+
         initView()
     }
 
diff --git a/app/src/main/java/xyz/quaver/pupil/util/update.kt b/app/src/main/java/xyz/quaver/pupil/util/update.kt
index c034d074..e8e3bb90 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/update.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/update.kt
@@ -32,7 +32,6 @@ import androidx.appcompat.app.AlertDialog
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.preference.PreferenceManager
-import com.google.firebase.crashlytics.FirebaseCrashlytics
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -182,7 +181,7 @@ fun checkUpdate(context: Context, force: Boolean = false) {
                     Preferences["update_download_id"] = it
                 }
             }
-            setNegativeButton(if (force) android.R.string.cancel else R.string.ignore_update) { _, _ ->
+            setNegativeButton(if (force) android.R.string.cancel else R.string.ignore) { _, _ ->
                 if (!force)
                     preferences.edit()
                         .putLong("ignore_update_until", System.currentTimeMillis() + 604800000)
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index fcce73f7..117f470c 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -73,7 +73,7 @@
     <string name="main_menu_sort">ソート</string>
     <string name="main_menu_sort_newest">投稿日時順</string>
     <string name="main_menu_sort_popular">人気順</string>
-    <string name="ignore_update">無視</string>
+    <string name="ignore">無視</string>
     <string name="lock_corrupted">ロックファイルが破損されています。Pupilを再再インストールしてください。</string>
     <string name="settings_dark_mode_title">ダークモード</string>
     <string name="settings_dark_mode_summary">夜にシコりたい方々へ</string>
@@ -155,4 +155,5 @@
     <string name="settings_tag_translation">タグ言語</string>
     <string name="settings_tag_translation_message">Githubにて翻訳に参加できます</string>
     <string name="settings_concurrent_download">並列ダウンロード</string>
+    <string name="unaccessible_download_folder">アンドロイド11以上では外部からのアプリ内部空間接近が不可能です。ダウンロードフォルダを変更しますか？</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-ko/strings.xml b/app/src/main/res/values-ko/strings.xml
index 4824b0a7..bad91ff6 100644
--- a/app/src/main/res/values-ko/strings.xml
+++ b/app/src/main/res/values-ko/strings.xml
@@ -71,7 +71,7 @@
     <string name="main_menu_sort">정렬</string>
     <string name="main_menu_sort_popular">인기순</string>
     <string name="main_menu_sort_newest">시간순</string>
-    <string name="ignore_update">무시</string>
+    <string name="ignore">무시</string>
     <string name="lock_corrupted">잠금 파일이 손상되었습니다! 앱을 재설치 해 주시기 바랍니다.</string>
     <string name="settings_dark_mode_title">다크 모드</string>
     <string name="settings_dark_mode_summary">딥 다크한 모오드</string>
@@ -155,4 +155,5 @@
     <string name="settings_tag_translation">태그 언어</string>
     <string name="settings_tag_translation_message">Github에서 번역에 참여하세요</string>
     <string name="settings_concurrent_download">병렬 다운로드</string>
+    <string name="unaccessible_download_folder">안드로이드 11 이상에서는 외부에서 현재 다운로드 폴더에 접근할 수 없습니다. 변경하시겠습니까?</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 90b50039..e35614fe 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -28,7 +28,7 @@
     <string name="warning">Warning</string>
     <string name="error">Error</string>
 
-    <string name="ignore_update">Ignore</string>
+    <string name="ignore">Ignore</string>
 
     <string name="copied_to_clipboard">Copied to clipboard</string>
 
@@ -47,6 +47,8 @@
 
     <string name="main_no_result">No result</string>
 
+    <string name="unaccessible_download_folder">From Android 11 and above, current Download folder cannot be accessed by outside apps. Would you like to change the download folder?</string>
+
     <string name="main_drawer_home">Home</string>
     <string name="main_drawer_history">History</string>
     <string name="main_drawer_downloads">Downloads</string>