diff --git a/app/build.gradle b/app/build.gradle
index 24e2d0f9..47dd0fd6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -20,7 +20,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 29
         versionCode 57
-        versionName "4.19-hotfix1"
+        versionName "4.19-hotfix3"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         multiDexEnabled true
         vectorDrawables.useSupportLibrary = true
diff --git a/app/release/output-metadata.json b/app/release/output-metadata.json
index 7f90aa3e..286525d2 100644
--- a/app/release/output-metadata.json
+++ b/app/release/output-metadata.json
@@ -12,7 +12,7 @@
       "filters": [],
       "properties": [],
       "versionCode": 57,
-      "versionName": "4.19-hotfix1",
+      "versionName": "4.19-hotfix3",
       "enabled": true,
       "outputFile": "app-release.apk"
     }
diff --git a/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt b/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt
index b3661f2f..b3609476 100644
--- a/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt
+++ b/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt
@@ -21,7 +21,6 @@
 package xyz.quaver.pupil
 
 import android.util.Log
-import androidx.core.content.ContextCompat
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.ActivityTestRule
@@ -36,6 +35,8 @@ import xyz.quaver.hiyobi.user_agent
 import xyz.quaver.pupil.ui.LockActivity
 import xyz.quaver.pupil.util.download.Cache
 import xyz.quaver.pupil.util.download.DownloadWorker
+import xyz.quaver.pupil.util.getDownloadDirectory
+import java.io.InputStreamReader
 import java.net.URL
 import javax.net.ssl.HttpsURLConnection
 
@@ -58,8 +59,10 @@ class ExampleInstrumentedTest {
         val activityTestRule = ActivityTestRule(LockActivity::class.java)
         val appContext = InstrumentationRegistry.getInstrumentation().targetContext
 
-        ContextCompat.getExternalFilesDirs(appContext, null).forEachIndexed { index, file ->
-            Log.i("PUPILD", "$index: ${file?.absolutePath}")
+        Runtime.getRuntime().exec("du -hs " + getDownloadDirectory(appContext)).let {
+            InputStreamReader(it.inputStream).readLines().forEach { res ->
+                Log.i("PUPILD", res)
+            }
         }
     }
 
diff --git a/app/src/main/java/xyz/quaver/pupil/ui/fragment/SettingsFragment.kt b/app/src/main/java/xyz/quaver/pupil/ui/fragment/SettingsFragment.kt
index d975355d..0fa2e68b 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/fragment/SettingsFragment.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/fragment/SettingsFragment.kt
@@ -33,6 +33,9 @@ import androidx.preference.PreferenceCategory
 import androidx.preference.PreferenceFragmentCompat
 import androidx.preference.PreferenceManager
 import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import net.rdrei.android.dirchooser.DirectoryChooserActivity
 import net.rdrei.android.dirchooser.DirectoryChooserConfig
 import xyz.quaver.pupil.Pupil
@@ -44,7 +47,9 @@ import xyz.quaver.pupil.ui.dialog.DownloadLocationDialog
 import xyz.quaver.pupil.ui.dialog.MirrorDialog
 import xyz.quaver.pupil.ui.dialog.ProxyDialog
 import xyz.quaver.pupil.util.*
+import java.io.BufferedReader
 import java.io.File
+import java.io.InputStreamReader
 
 
 class SettingsFragment :
@@ -74,9 +79,13 @@ class SettingsFragment :
     }
 
     private fun getDirSize(dir: File) : String {
-        val size = dir.walk().map { it.length() }.sum()
-
-        return getString(R.string.settings_clear_summary, byteToString(size))
+        return getString(R.string.settings_storage_usage,
+            Runtime.getRuntime().exec("du -hs " + dir.absolutePath).let {
+                BufferedReader(InputStreamReader(it.inputStream)).use { reader ->
+                    reader.readLine().split('\t').firstOrNull() ?: "0"
+                }
+            }
+        )
     }
 
     override fun onPreferenceClick(preference: Preference?): Boolean {
@@ -97,7 +106,13 @@ class SettingsFragment :
                             if (dir.exists())
                                 dir.deleteRecursively()
 
-                            summary = getDirSize(dir)
+                            CoroutineScope(Dispatchers.IO).launch {
+                                summary = getString(R.string.settings_storage_usage_loading)
+
+                                launch(Dispatchers.Main) {
+                                    this@with.summary = getDirSize(dir)
+                                }
+                            }
                         }
                         setNegativeButton(android.R.string.no) { _, _ -> }
                     }.show()
@@ -112,7 +127,13 @@ class SettingsFragment :
                             if (dir.exists())
                                 dir.deleteRecursively()
 
-                            summary = getDirSize(dir)
+                            CoroutineScope(Dispatchers.IO).launch {
+                                summary = getString(R.string.settings_storage_usage_loading)
+
+                                launch(Dispatchers.Main) {
+                                    this@with.summary = getDirSize(dir)
+                                }
+                            }
                         }
                         setNegativeButton(android.R.string.no) { _, _ -> }
                     }.show()
@@ -276,13 +297,27 @@ class SettingsFragment :
                         }
                         "delete_cache" -> {
                             val dir = File(requireContext().cacheDir, "imageCache")
-                            summary = getDirSize(dir)
+
+                            CoroutineScope(Dispatchers.IO).launch {
+                                summary = getString(R.string.settings_storage_usage_loading)
+
+                                launch(Dispatchers.Main) {
+                                    this@with.summary = getDirSize(dir)
+                                }
+                            }
 
                             onPreferenceClickListener = this@SettingsFragment
                         }
                         "delete_downloads" -> {
                             val dir = getDownloadDirectory(requireContext())
-                            summary = getDirSize(dir)
+
+                            CoroutineScope(Dispatchers.IO).launch {
+                                summary = getString(R.string.settings_storage_usage_loading)
+
+                                launch(Dispatchers.Main) {
+                                    this@with.summary = getDirSize(dir)
+                                }
+                            }
 
                             onPreferenceClickListener = this@SettingsFragment
                         }
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 9a0f825e..a05a6391 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -9,7 +9,8 @@
     <string name="search_hint_with_page">ギャラリー検索</string>
     <string name="settings_clear_cache">キャッシュクリア</string>
     <string name="settings_clear_cache_alert_message">キャッシュをクリアするとイメージのロード速度に影響を与えます。実行しますか？</string>
-    <string name="settings_clear_summary">サイズ: %s</string>
+    <string name="settings_storage_usage">%s使用中</string>
+    <string name="settings_storage_usage_loading">ストレージ使用量読み込み中…</string>
     <string name="settings_default_query">デフォルトキーワード</string>
     <string name="settings_galleries_per_page">一回にロードするギャラリー数</string>
     <string name="settings_search_title">検索設定</string>
diff --git a/app/src/main/res/values-ko/strings.xml b/app/src/main/res/values-ko/strings.xml
index 4c065d0b..6b8ec322 100644
--- a/app/src/main/res/values-ko/strings.xml
+++ b/app/src/main/res/values-ko/strings.xml
@@ -8,7 +8,8 @@
     <string name="settings_default_query">기본 검색어</string>
     <string name="settings_clear_cache">캐시 정리하기</string>
     <string name="settings_clear_cache_alert_message">캐시를 정리하면 이미지 로딩속도가 느려질 수 있습니다. 계속하시겠습니까?</string>
-    <string name="settings_clear_summary">사용량: %s</string>
+    <string name="settings_storage_usage">%s 사용중</string>
+    <string name="settings_storage_usage_loading">저장공간 사용량 계산 중…</string>
     <string name="settings_galleries_per_page">한 번에 로드할 갤러리 수</string>
     <string name="settings_search_title">검색 설정</string>
     <string name="settings_title">설정</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f1765704..f23b1e29 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -142,9 +142,10 @@
     <!-- SETTINGS/STORAGE -->
 
     <string name="settings_storage">Storage</string>
+    <string name="settings_storage_usage">Currently using %s</string>
+    <string name="settings_storage_usage_loading">Calculating storage usage…</string>
     <string name="settings_clear_cache">Clear cache</string>
     <string name="settings_clear_cache_alert_message">Deleting cache can affect image loading speed. Do you want to continue?</string>
-    <string name="settings_clear_summary">Currently using %s</string>
     <string name="settings_clear_downloads">Clear downloads</string>
     <string name="settings_clear_downloads_alert_message">Delete all downloaded galleries.\nDo you want to continue?</string>
     <string name="settings_clear_history">Clear history</string>