diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 50caf32..d5c0871 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -138,6 +138,7 @@
     public static class MemorySettingsActivity extends SettingsActivity { /* empty */ }
     public static class AppMemoryUsageActivity extends SettingsActivity { /* empty */ }
     public static class OverlaySettingsActivity extends SettingsActivity { /* empty */ }
+    public static class ManageExternalStorageActivity extends SettingsActivity { /* empty */ }
     public static class WriteSettingsActivity extends SettingsActivity { /* empty */ }
     public static class ChangeWifiStateActivity extends SettingsActivity { /* empty */ }
     public static class AppDrawOverlaySettingsActivity extends SettingsActivity { /* empty */ }
diff --git a/src/com/android/settings/applications/AppStateAppOpsBridge.java b/src/com/android/settings/applications/AppStateAppOpsBridge.java
index 0e3ee2d..3dbdbe9 100755
--- a/src/com/android/settings/applications/AppStateAppOpsBridge.java
+++ b/src/com/android/settings/applications/AppStateAppOpsBridge.java
@@ -328,7 +328,7 @@
         public boolean isPermissible() {
             // defining the default behavior as permissible as long as the package requested this
             // permission (this means pre-M gets approval during install time; M apps gets approval
-            // during runtime.
+            // during runtime).
             if (appOpMode == AppOpsManager.MODE_DEFAULT) {
                 return staticPermissionGranted;
             }
diff --git a/src/com/android/settings/applications/AppStateManageExternalStorageBridge.java b/src/com/android/settings/applications/AppStateManageExternalStorageBridge.java
new file mode 100644
index 0000000..5a69035
--- /dev/null
+++ b/src/com/android/settings/applications/AppStateManageExternalStorageBridge.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.applications;
+
+import android.Manifest;
+import android.app.AppOpsManager;
+import android.content.Context;
+
+import com.android.settingslib.applications.ApplicationsState;
+
+/**
+ * Retrieves information from {@link AppOpsManager} and {@link android.content.pm.PackageManager}
+ * regarding {@link AppOpsManager#OP_MANAGE_EXTERNAL_STORAGE} and
+ * {@link Manifest.permission#MANAGE_EXTERNAL_STORAGE}.
+ */
+public class AppStateManageExternalStorageBridge extends AppStateAppOpsBridge {
+    private static final int APP_OPS_OP_CODE = AppOpsManager.OP_MANAGE_EXTERNAL_STORAGE;
+    private static final String[] PERMISSIONS = {
+            Manifest.permission.MANAGE_EXTERNAL_STORAGE
+    };
+
+    public AppStateManageExternalStorageBridge(Context context, ApplicationsState appState,
+            Callback callback) {
+        super(context, appState, callback, APP_OPS_OP_CODE, PERMISSIONS);
+    }
+
+    @Override
+    protected void updateExtraInfo(ApplicationsState.AppEntry app, String pkg, int uid) {
+        app.extraInfo = getManageExternalStoragePermState(pkg, uid);
+    }
+
+    /**
+     * Returns the MANAGE_EXTERNAL_STORAGE {@link AppStateAppOpsBridge.PermissionState} object
+     * associated with the given package and user.
+     */
+    public PermissionState getManageExternalStoragePermState(String pkg, int uid) {
+        return getPermissionInfo(pkg, uid);
+    }
+
+    /**
+     * Used by {@link com.android.settings.applications.manageapplications.AppFilterRegistry} to
+     * determine which apps get to appear on the Special App Access list.
+     */
+    public static final ApplicationsState.AppFilter FILTER_MANAGE_EXTERNAL_STORAGE =
+            new ApplicationsState.AppFilter() {
+        @Override
+        public void init() {
+        }
+
+        @Override
+        public boolean filterApp(ApplicationsState.AppEntry info) {
+            // If extraInfo != null, it means that the app has declared
+            // Manifest.permission.MANAGE_EXTERNAL_STORAGE and therefore it should appear on our
+            // list
+            return info.extraInfo != null;
+        }
+    };
+}
diff --git a/src/com/android/settings/applications/appinfo/ManageExternalStorageDetails.java b/src/com/android/settings/applications/appinfo/ManageExternalStorageDetails.java
new file mode 100644
index 0000000..63ce440
--- /dev/null
+++ b/src/com/android/settings/applications/appinfo/ManageExternalStorageDetails.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.settings.applications.appinfo;
+
+import android.app.AppOpsManager;
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.appcompat.app.AlertDialog;
+import androidx.preference.Preference;
+import androidx.preference.Preference.OnPreferenceChangeListener;
+import androidx.preference.Preference.OnPreferenceClickListener;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.R;
+import com.android.settings.applications.AppInfoWithHeader;
+import com.android.settings.applications.AppStateAppOpsBridge.PermissionState;
+import com.android.settings.applications.AppStateManageExternalStorageBridge;
+import com.android.settings.overlay.FeatureFactory;
+import com.android.settingslib.applications.ApplicationsState.AppEntry;
+import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
+
+/**
+ * Class for displaying app info related to {@link AppOpsManager#OP_MANAGE_EXTERNAL_STORAGE}.
+ */
+public class ManageExternalStorageDetails extends AppInfoWithHeader implements
+        OnPreferenceChangeListener, OnPreferenceClickListener {
+
+    private static final String KEY_APP_OPS_SETTINGS_SWITCH = "app_ops_settings_switch";
+
+    private AppStateManageExternalStorageBridge mBridge;
+    private AppOpsManager mAppOpsManager;
+    private SwitchPreference mSwitchPref;
+    private PermissionState mPermissionState;
+    private MetricsFeatureProvider mMetricsFeatureProvider;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        Context context = getActivity();
+        mBridge = new AppStateManageExternalStorageBridge(context, mState, null);
+        mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
+
+        // initialize preferences
+        addPreferencesFromResource(R.xml.manage_external_storage_permission_details);
+        mSwitchPref = findPreference(KEY_APP_OPS_SETTINGS_SWITCH);
+
+        // install event listeners
+        mSwitchPref.setOnPreferenceChangeListener(this);
+
+        mMetricsFeatureProvider =
+                FeatureFactory.getFactory(getContext()).getMetricsFeatureProvider();
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater,
+            ViewGroup container,
+            Bundle savedInstanceState) {
+        // if we don't have a package info, show a page saying this is unsupported
+        if (mPackageInfo == null) {
+            return inflater.inflate(R.layout.manage_applications_apps_unsupported, null);
+        }
+        return super.onCreateView(inflater, container, savedInstanceState);
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        mBridge.release();
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+        return false;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        if (preference == mSwitchPref) {
+            if (mPermissionState != null && !newValue.equals(mPermissionState.isPermissible())) {
+                setManageExternalStorageState((Boolean) newValue);
+                refreshUi();
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Toggles {@link AppOpsManager#OP_MANAGE_EXTERNAL_STORAGE} for the app.
+     */
+    private void setManageExternalStorageState(boolean newState) {
+        logSpecialPermissionChange(newState, mPackageName);
+        mAppOpsManager.setMode(AppOpsManager.OP_MANAGE_EXTERNAL_STORAGE,
+                mPackageInfo.applicationInfo.uid, mPackageName, newState
+                        ? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED);
+    }
+
+    private void logSpecialPermissionChange(boolean newState, String packageName) {
+        int logCategory = newState ? SettingsEnums.APP_SPECIAL_PERMISSION_MANAGE_EXT_STRG_ALLOW
+                : SettingsEnums.APP_SPECIAL_PERMISSION_MANAGE_EXT_STRG_DENY;
+
+        mMetricsFeatureProvider.action(
+                mMetricsFeatureProvider.getAttribution(getActivity()),
+                logCategory,
+                getMetricsCategory(),
+                packageName,
+                0 /* value */);
+    }
+
+    @Override
+    protected boolean refreshUi() {
+        if (mPackageInfo == null) {
+            return true;
+        }
+
+        mPermissionState = mBridge.getManageExternalStoragePermState(mPackageName,
+                mPackageInfo.applicationInfo.uid);
+
+        mSwitchPref.setChecked(mPermissionState.isPermissible());
+
+        // you cannot ask a user to grant you a permission you did not have!
+        mSwitchPref.setEnabled(mPermissionState.permissionDeclared);
+
+        return true;
+    }
+
+    @Override
+    protected AlertDialog createDialog(int id, int errorCode) {
+        return null;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return SettingsEnums.MANAGE_EXTERNAL_STORAGE;
+    }
+
+    /**
+     * Returns the string that states whether whether the app has access to
+     * {@link AppOpsManager#OP_MANAGE_EXTERNAL_STORAGE}.
+     * <p>This string is used in the "All files access" page that displays all apps requesting
+     * {@link android.Manifest.permission#MANAGE_EXTERNAL_STORAGE}
+     */
+    public static CharSequence getSummary(Context context, AppEntry entry) {
+        final PermissionState state;
+        if (entry.extraInfo instanceof PermissionState) {
+            state = (PermissionState) entry.extraInfo;
+        } else {
+            state = new AppStateManageExternalStorageBridge(context, null, null)
+                    .getManageExternalStoragePermState(entry.info.packageName, entry.info.uid);
+        }
+
+        return getSummary(context, state);
+    }
+
+    private static CharSequence getSummary(Context context, PermissionState state) {
+        return context.getString(state.isPermissible()
+                ? R.string.app_permission_summary_allowed
+                : R.string.app_permission_summary_not_allowed);
+    }
+}
diff --git a/src/com/android/settings/applications/manageapplications/AppFilterRegistry.java b/src/com/android/settings/applications/manageapplications/AppFilterRegistry.java
index 250dce0..58907a7 100644
--- a/src/com/android/settings/applications/manageapplications/AppFilterRegistry.java
+++ b/src/com/android/settings/applications/manageapplications/AppFilterRegistry.java
@@ -20,6 +20,7 @@
 
 import com.android.settings.R;
 import com.android.settings.applications.AppStateInstallAppsBridge;
+import com.android.settings.applications.AppStateManageExternalStorageBridge;
 import com.android.settings.applications.AppStateNotificationBridge;
 import com.android.settings.applications.AppStateOverlayBridge;
 import com.android.settings.applications.AppStatePowerBridge;
@@ -71,14 +72,15 @@
     public static final int FILTER_APPS_INSTALL_SOURCES = 13;
     public static final int FILTER_APP_CAN_CHANGE_WIFI_STATE = 15;
     public static final int FILTER_APPS_BLOCKED = 16;
-    // Next id: 17
+    public static final int FILTER_MANAGE_EXTERNAL_STORAGE = 17;
+    // Next id: 18. If you add an entry here, length of mFilters should be updated
 
     private static AppFilterRegistry sRegistry;
 
     private final AppFilterItem[] mFilters;
 
     private AppFilterRegistry() {
-        mFilters = new AppFilterItem[17];
+        mFilters = new AppFilterItem[18];
 
         // High power whitelist, on
         mFilters[FILTER_APPS_POWER_WHITELIST] = new AppFilterItem(
@@ -178,6 +180,11 @@
                 AppStateNotificationBridge.FILTER_APP_NOTIFICATION_BLOCKED,
                 FILTER_APPS_BLOCKED,
                 R.string.filter_notif_blocked_apps);
+
+        mFilters[FILTER_MANAGE_EXTERNAL_STORAGE] = new AppFilterItem(
+                AppStateManageExternalStorageBridge.FILTER_MANAGE_EXTERNAL_STORAGE,
+                FILTER_MANAGE_EXTERNAL_STORAGE,
+                R.string.filter_manage_external_storage);
     }
 
     public static AppFilterRegistry getInstance() {
@@ -204,6 +211,8 @@
                 return FILTER_APP_CAN_CHANGE_WIFI_STATE;
             case ManageApplications.LIST_TYPE_NOTIFICATION:
                 return FILTER_APPS_RECENT;
+            case ManageApplications.LIST_MANAGE_EXTERNAL_STORAGE:
+                return FILTER_MANAGE_EXTERNAL_STORAGE;
             default:
                 return FILTER_APPS_ALL;
         }
diff --git a/src/com/android/settings/applications/manageapplications/ManageApplications.java b/src/com/android/settings/applications/manageapplications/ManageApplications.java
index 02e42e2..d38893f 100644
--- a/src/com/android/settings/applications/manageapplications/ManageApplications.java
+++ b/src/com/android/settings/applications/manageapplications/ManageApplications.java
@@ -88,6 +88,7 @@
 import com.android.settings.SettingsActivity;
 import com.android.settings.Utils;
 import com.android.settings.applications.AppInfoBase;
+import com.android.settings.applications.AppStateManageExternalStorageBridge;
 import com.android.settings.applications.AppStateAppOpsBridge.PermissionState;
 import com.android.settings.applications.AppStateBaseBridge;
 import com.android.settings.applications.AppStateInstallAppsBridge;
@@ -100,6 +101,7 @@
 import com.android.settings.applications.AppStateWriteSettingsBridge;
 import com.android.settings.applications.AppStorageSettings;
 import com.android.settings.applications.UsageAccessDetails;
+import com.android.settings.applications.appinfo.ManageExternalStorageDetails;
 import com.android.settings.applications.appinfo.AppInfoDashboardFragment;
 import com.android.settings.applications.appinfo.DrawOverlayDetails;
 import com.android.settings.applications.appinfo.ExternalSourcesDetails;
@@ -224,6 +226,7 @@
     public static final int LIST_TYPE_MOVIES = 10;
     public static final int LIST_TYPE_PHOTOGRAPHY = 11;
     public static final int LIST_TYPE_WIFI_ACCESS = 13;
+    public static final int LIST_MANAGE_EXTERNAL_STORAGE = 14;
 
     // List types that should show instant apps.
     public static final Set<Integer> LIST_TYPES_WITH_INSTANT = new ArraySet<>(Arrays.asList(
@@ -311,6 +314,9 @@
         } else if (className.equals(Settings.ChangeWifiStateActivity.class.getName())) {
             mListType = LIST_TYPE_WIFI_ACCESS;
             screenTitle = R.string.change_wifi_state_title;
+        } else if (className.equals(Settings.ManageExternalStorageActivity.class.getName())) {
+            mListType = LIST_MANAGE_EXTERNAL_STORAGE;
+            screenTitle = R.string.manage_external_storage_title;
         } else if (className.equals(Settings.NotificationAppListActivity.class.getName())) {
             mListType = LIST_TYPE_NOTIFICATION;
             mUsageStatsManager = IUsageStatsManager.Stub.asInterface(
@@ -538,6 +544,8 @@
                 return SettingsEnums.MANAGE_EXTERNAL_SOURCES;
             case LIST_TYPE_WIFI_ACCESS:
                 return SettingsEnums.CONFIGURE_WIFI;
+            case LIST_MANAGE_EXTERNAL_STORAGE:
+                return SettingsEnums.MANAGE_EXTERNAL_STORAGE;
             default:
                 return SettingsEnums.PAGE_UNKNOWN;
         }
@@ -640,6 +648,10 @@
                 startAppInfoFragment(ChangeWifiStateDetails.class,
                         R.string.change_wifi_state_title);
                 break;
+            case LIST_MANAGE_EXTERNAL_STORAGE:
+                startAppInfoFragment(ManageExternalStorageDetails.class,
+                        R.string.manage_external_storage_title);
+                break;
             // TODO: Figure out if there is a way where we can spin up the profile's settings
             // process ahead of time, to avoid a long load of data when user clicks on a managed
             // app. Maybe when they load the list of apps that contains managed profile apps.
@@ -713,6 +725,8 @@
                 return R.string.help_uri_apps_photography;
             case LIST_TYPE_WIFI_ACCESS:
                 return R.string.help_uri_apps_wifi_access;
+            case LIST_MANAGE_EXTERNAL_STORAGE:
+                return R.string.help_uri_manage_external_storage;
             default:
             case LIST_TYPE_MAIN:
                 return R.string.help_uri_apps;
@@ -1031,6 +1045,8 @@
                 mExtraInfoBridge = new AppStateInstallAppsBridge(mContext, mState, this);
             } else if (mManageApplications.mListType == LIST_TYPE_WIFI_ACCESS) {
                 mExtraInfoBridge = new AppStateChangeWifiStateBridge(mContext, mState, this);
+            } else if (mManageApplications.mListType == LIST_MANAGE_EXTERNAL_STORAGE) {
+                mExtraInfoBridge = new AppStateManageExternalStorageBridge(mContext, mState, this);
             } else {
                 mExtraInfoBridge = null;
             }
@@ -1486,6 +1502,9 @@
                 case LIST_TYPE_WIFI_ACCESS:
                     holder.setSummary(ChangeWifiStateDetails.getSummary(mContext, entry));
                     break;
+                case LIST_MANAGE_EXTERNAL_STORAGE:
+                    holder.setSummary(ManageExternalStorageDetails.getSummary(mContext, entry));
+                    break;
                 default:
                     holder.updateSizeText(entry, mManageApplications.mInvalidSizeStr, mWhichSize);
                     break;