diff --git a/app/src/main/java/com/hippo/ehviewer/AppConfig.java b/app/src/main/java/com/hippo/ehviewer/AppConfig.java
index 8e116fc55..e2efaf13c 100644
--- a/app/src/main/java/com/hippo/ehviewer/AppConfig.java
+++ b/app/src/main/java/com/hippo/ehviewer/AppConfig.java
@@ -34,6 +34,7 @@ public class AppConfig {
     private static final String CRASH = "crash";
     private static final String PARSE_ERROR = "parse_error";
     private static final String LOGCAT = "logcat";
+    private static final String DATA = "data";
 
     private static Context sContext;
 
@@ -103,6 +104,11 @@ public class AppConfig {
         return getDirInExternalAppDir(LOGCAT);
     }
 
+    @Nullable
+    public static File getExternalDataDir() {
+        return getDirInExternalAppDir(DATA);
+    }
+
     @Nullable
     public static File createExternalTempFile() {
         return FileUtils.createTempFile(getExternalTempDir(), null);
diff --git a/app/src/main/java/com/hippo/ehviewer/EhDB.java b/app/src/main/java/com/hippo/ehviewer/EhDB.java
index 49a76990f..89a9d25a9 100644
--- a/app/src/main/java/com/hippo/ehviewer/EhDB.java
+++ b/app/src/main/java/com/hippo/ehviewer/EhDB.java
@@ -43,8 +43,16 @@ import com.hippo.ehviewer.dao.LocalFavoritesDao;
 import com.hippo.ehviewer.dao.QuickSearch;
 import com.hippo.ehviewer.dao.QuickSearchDao;
 import com.hippo.util.SqlUtils;
+import com.hippo.yorozuya.FileUtils;
+import com.hippo.yorozuya.IOUtils;
 import com.hippo.yorozuya.sparse.SparseJLArray;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -564,4 +572,172 @@ public class EhDB {
     public static synchronized void deleteFilter(Filter filter) {
         sDaoSession.getFilterDao().delete(filter);
     }
+
+    public static synchronized boolean export(Context context, File file) {
+        File dbFile = context.getDatabasePath("eh.db");
+        if (null == dbFile || !dbFile.isFile()) {
+            return false;
+        }
+        if (null == file || !FileUtils.ensureFile(file)) {
+            return false;
+        }
+        InputStream is = null;
+        OutputStream os = null;
+        try {
+            is = new FileInputStream(dbFile);
+            os = new FileOutputStream(file);
+            IOUtils.copy(is, os);
+            return true;
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            IOUtils.closeQuietly(is);
+            IOUtils.closeQuietly(os);
+        }
+        // Delete failed file
+        file.delete();
+        return false;
+    }
+
+
+
+    /*
+    public static synchronized void write(OutputStream os) throws JSONException {
+        JSONObject jo = new JSONObject();
+        jo.put("version", DaoMaster.SCHEMA_VERSION);
+        jo.put("data", getDBJson());
+
+
+
+    }
+
+    private static JSONObject getDBJson() throws JSONException {
+        JSONObject jo = new JSONObject();
+        jo.put(DownloadsDao.TABLENAME, getDownloadsDaoJson());
+        jo.put(DownloadLabelDao.TABLENAME, getDownloadLabelDaoJson());
+        jo.put(DownloadDirnameDao.TABLENAME, getDownloadDirnameDaoJson());
+
+
+
+        return jo;
+    }
+
+    private static JSONArray getDownloadsDaoJson() {
+        DownloadsDao dao = sDaoSession.getDownloadsDao();
+        JSONArray ja = new JSONArray();
+        LazyList<DownloadInfo> list = dao.queryBuilder().listLazy();
+        for (DownloadInfo info: list) {
+            JSONObject jo = getDownloadInfoJson(info);
+            if (null != jo) {
+                ja.put(jo);
+            }
+        }
+        list.close();
+        return ja;
+    }
+
+    private static JSONObject getDownloadInfoJson(DownloadInfo info) {
+        try {
+            JSONObject jo = new JSONObject();
+            jo.put("gid", info.gid);
+            jo.put("token", info.token);
+            jo.put("title", info.title);
+            jo.put("titleJpn", info.titleJpn);
+            jo.put("thumb", info.thumb);
+            jo.put("category", info.category);
+            jo.put("posted", info.posted);
+            jo.put("uploader", info.uploader);
+            jo.put("rating", info.rating);
+            jo.put("simpleLanguage", info.simpleLanguage);
+            jo.put("state", info.state);
+            jo.put("legacy", info.legacy);
+            jo.put("time", info.time);
+            jo.put("label", info.label);
+            return jo;
+        } catch (JSONException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    private static JSONArray getDownloadLabelDaoJson() {
+        DownloadLabelDao dao = sDaoSession.getDownloadLabelDao();
+        JSONArray ja = new JSONArray();
+        LazyList<DownloadLabel> list = dao.queryBuilder().listLazy();
+        for (DownloadLabel label: list) {
+            JSONObject jo = getDownloadLabelJson(label);
+            if (null != jo) {
+                ja.put(jo);
+            }
+        }
+        list.close();
+        return ja;
+    }
+
+    private static JSONObject getDownloadLabelJson(DownloadLabel label) {
+        try {
+            JSONObject jo = new JSONObject();
+            jo.put("label", label.getLabel());
+            jo.put("time", label.getTime());
+            return jo;
+        } catch (JSONException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    private static JSONArray getDownloadDirnameDaoJson() {
+        DownloadDirnameDao dao = sDaoSession.getDownloadDirnameDao();
+        JSONArray ja = new JSONArray();
+        LazyList<DownloadDirname> list = dao.queryBuilder().listLazy();
+        for (DownloadDirname dirname: list) {
+            JSONObject jo = getDownloadDirnameJson(dirname);
+            if (null != jo) {
+                ja.put(jo);
+            }
+        }
+        list.close();
+        return ja;
+    }
+
+    private static JSONObject getDownloadDirnameJson(DownloadDirname dirname) {
+        try {
+            JSONObject jo = new JSONObject();
+            jo.put("gid", dirname.getGid());
+            jo.put("dirname", dirname.getDirname());
+            return jo;
+        } catch (JSONException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    private static JSONArray getHistoryDaoJson() {
+        HistoryDao dao = sDaoSession.getHistoryDao();
+        JSONArray ja = new JSONArray();
+        LazyList<HistoryInfo> list = dao.queryBuilder().listLazy();
+        for (HistoryInfo info: list) {
+            JSONObject jo = getDownloadDirnameJson(info);
+            if (null != jo) {
+                ja.put(jo);
+            }
+        }
+        list.close();
+        return ja;
+    }
+
+    private static JSONObject getHistoryInfoJson(HistoryInfo info) {
+        try {
+            JSONObject jo = new JSONObject();
+
+
+
+
+            return jo;
+        } catch (JSONException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+    */
 }
diff --git a/app/src/main/java/com/hippo/ehviewer/ui/fragment/AdvancedFragment.java b/app/src/main/java/com/hippo/ehviewer/ui/fragment/AdvancedFragment.java
index 6d7865c1a..af8bd3427 100644
--- a/app/src/main/java/com/hippo/ehviewer/ui/fragment/AdvancedFragment.java
+++ b/app/src/main/java/com/hippo/ehviewer/ui/fragment/AdvancedFragment.java
@@ -16,6 +16,7 @@
 
 package com.hippo.ehviewer.ui.fragment;
 
+import android.content.Context;
 import android.content.res.Resources;
 import android.os.Bundle;
 import android.preference.Preference;
@@ -25,6 +26,7 @@ import android.widget.Toast;
 
 import com.hippo.ehviewer.AppConfig;
 import com.hippo.ehviewer.EhApplication;
+import com.hippo.ehviewer.EhDB;
 import com.hippo.ehviewer.R;
 import com.hippo.ehviewer.Settings;
 import com.hippo.util.LogCat;
@@ -37,6 +39,7 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
     private static final String KEY_DUMP_LOGCAT = "dump_logcat";
     private static final String KEY_CLEAR_MEMORY_CACHE = "clear_memory_cache";
     private static final String KEY_PATTERN_PROTECTION = "pattern_protection";
+    private static final String KEY_EXPORT_DATA = "export_data";
 
     @Override
     public void onCreate(Bundle savedInstanceState) {
@@ -45,9 +48,11 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
 
         Preference dumpLogcat = findPreference(KEY_DUMP_LOGCAT);
         Preference clearMemoryCache = findPreference(KEY_CLEAR_MEMORY_CACHE);
+        Preference exportData = findPreference(KEY_EXPORT_DATA);
 
         dumpLogcat.setOnPreferenceClickListener(this);
         clearMemoryCache.setOnPreferenceClickListener(this);
+        exportData.setOnPreferenceClickListener(this);
     }
 
     @Override
@@ -81,7 +86,38 @@ public class AdvancedFragment extends PreferenceFragment implements Preference.O
         } else if (KEY_CLEAR_MEMORY_CACHE.equals(key)) {
             ((EhApplication) getActivity().getApplication()).clearMemoryCache();
             Runtime.getRuntime().gc();
+        } else if (KEY_EXPORT_DATA.equals(key)) {
+            File dir = AppConfig.getExternalDataDir();
+            if (dir != null) {
+                File file = new File(dir, ReadableTime.getFilenamableTime(System.currentTimeMillis()) + ".db");
+                if (EhDB.export(getActivity(), file)) {
+                    Toast.makeText(getActivity(),
+                            getString(R.string.settings_advanced_export_data_to, file.getPath()), Toast.LENGTH_SHORT).show();
+                    return true;
+                }
+            }
+            Toast.makeText(getActivity(),R.string.settings_advanced_export_data_failed, Toast.LENGTH_SHORT).show();
+            return false;
         }
         return false;
     }
+
+
+    private static boolean exportData(Context context) {
+        File dir = AppConfig.getExternalAppDir();
+        if (null == dir) {
+            return false;
+        }
+        File file = new File(ReadableTime.getFilenamableTime(System.currentTimeMillis()) + ".json");
+
+
+
+
+
+
+
+
+        return true;
+    }
+
 }
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 18f19ac9d..98f9f5bd7 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -402,6 +402,10 @@
     <string name="settings_advanced_pattern_protection_title">图案保护</string>
     <string name="settings_advanced_pattern_protection_not_set">未设置图案保护</string>
     <string name="settings_advanced_pattern_protection_set">已设置图案保护</string>
+    <string name="settings_advanced_export_data">导出数据</string>
+    <string name="settings_advanced_export_data_summary">保存数据至外置存储器，例如下载列表，快速搜索列表</string>
+    <string name="settings_advanced_export_data_to">已导出数据至 %s</string>
+    <string name="settings_advanced_export_data_failed">导出数据失败</string>
 
     <string name="settings_about">关于</string>
     <string name="settings_about_author">作者</string>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 3344c612d..c2f3da514 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -402,6 +402,10 @@
     <string name="settings_advanced_pattern_protection_title">圖案保護</string>
     <string name="settings_advanced_pattern_protection_not_set">未設置圖案保護</string>
     <string name="settings_advanced_pattern_protection_set">已設置圖案保護</string>
+    <string name="settings_advanced_export_data">導出數據</string>
+    <string name="settings_advanced_export_data_summary">保存數據至外置存儲器，例如下載列表，快速搜索列表</string>
+    <string name="settings_advanced_export_data_to">已導出數據至 %s</string>
+    <string name="settings_advanced_export_data_failed">導出數據失敗</string>
 
     <string name="settings_about">關於</string>
     <string name="settings_about_author">作者</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 612683c39..af19dc78a 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -402,6 +402,10 @@
     <string name="settings_advanced_pattern_protection_title">圖案保護</string>
     <string name="settings_advanced_pattern_protection_not_set">未設定圖案保護</string>
     <string name="settings_advanced_pattern_protection_set">已設定圖案保護</string>
+    <string name="settings_advanced_export_data">匯出資料</string>
+    <string name="settings_advanced_export_data_summary">儲存資料至外接儲存器，例如下載列表，快速搜尋列表</string>
+    <string name="settings_advanced_export_data_to">已匯出資料至 %s</string>
+    <string name="settings_advanced_export_data_failed">匯出資料失敗</string>
 
     <string name="settings_about">關於</string>
     <string name="settings_about_author">作者</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index e24e8e594..d02b6c07e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -444,6 +444,10 @@
     <string name="settings_advanced_pattern_protection_title">Pattern protection</string>
     <string name="settings_advanced_pattern_protection_not_set">Pattern protection has not been set</string>
     <string name="settings_advanced_pattern_protection_set">Pattern protection has been set</string>
+    <string name="settings_advanced_export_data">Export data</string>
+    <string name="settings_advanced_export_data_summary">Save data to external storage, such as download list, quick search list</string>
+    <string name="settings_advanced_export_data_to">Exported data to %s</string>
+    <string name="settings_advanced_export_data_failed">Export data failed</string>
 
     <string name="settings_about">About</string>
     <string name="settings_about_author">Author</string>
diff --git a/app/src/main/res/xml/advanced_settings.xml b/app/src/main/res/xml/advanced_settings.xml
index 85464d365..f417bf2d3 100644
--- a/app/src/main/res/xml/advanced_settings.xml
+++ b/app/src/main/res/xml/advanced_settings.xml
@@ -45,4 +45,9 @@
         android:title="@string/settings_advanced_pattern_protection_title"
         app:activity="com.hippo.ehviewer.ui.SetSecurityActivity"/>
 
+    <Preference
+        android:key="export_data"
+        android:title="@string/settings_advanced_export_data"
+        android:summary="@string/settings_advanced_export_data_summary"/>
+
 </PreferenceScreen>