diff --git a/android_app/app/build.gradle b/android_app/app/build.gradle
index 99fbccd7..c65c7e01 100644
--- a/android_app/app/build.gradle
+++ b/android_app/app/build.gradle
@@ -6,7 +6,7 @@ android {
     defaultConfig {
         applicationId "com.health.openscale"
         testApplicationId "com.health.openscale.test"
-        minSdkVersion 18
+        minSdkVersion 19
         targetSdkVersion 27
         versionCode 23
         versionName "1.7"
diff --git a/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java b/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java
index e13b6d8d..6b9fe3b4 100644
--- a/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java
+++ b/android_app/app/src/main/java/com/health/openscale/core/OpenScale.java
@@ -49,10 +49,11 @@ import com.health.openscale.core.utils.CsvHelper;
 import com.health.openscale.gui.fragments.FragmentUpdateListener;
 
 import java.io.BufferedReader;
-import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
 import java.text.ParseException;
 import java.util.ArrayList;
 import java.util.Calendar;
@@ -194,6 +195,18 @@ public class OpenScale {
     public void deleteScaleUser(int id) {
         userDAO.delete(userDAO.get(id));
         selectedScaleUser = null;
+
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+
+        // Remove user specific settings
+        SharedPreferences.Editor editor = prefs.edit();
+        final String prefix = ScaleUser.getPreferenceKey(id, "");
+        for (String key : prefs.getAll().keySet()) {
+            if (key.startsWith(prefix)) {
+                editor.remove(key);
+            }
+        }
+        editor.apply();
     }
 
     public void updateScaleUser(ScaleUser user) {
@@ -332,7 +345,7 @@ public class OpenScale {
         updateScaleData();
     }
 
-    private String getFilenameFromUri(Uri uri) {
+    public String getFilenameFromUri(Uri uri) {
         Cursor cursor = context.getContentResolver().query(
                 uri, null, null, null, null);
         cursor.moveToFirst();
@@ -362,9 +375,10 @@ public class OpenScale {
         }
     }
 
-    public boolean exportData(String filename) {
+    public boolean exportData(Uri uri) {
         try {
-            CsvHelper.exportTo(new FileWriter(filename), scaleMeasurementList);
+            OutputStream output = context.getContentResolver().openOutputStream(uri);
+            CsvHelper.exportTo(new OutputStreamWriter(output), scaleMeasurementList);
             return true;
         } catch (IOException e) {
             Toast.makeText(context, context.getResources().getString(R.string.error_exporting) + " " + e.getMessage(), Toast.LENGTH_SHORT).show();
diff --git a/android_app/app/src/main/java/com/health/openscale/core/datatypes/ScaleUser.java b/android_app/app/src/main/java/com/health/openscale/core/datatypes/ScaleUser.java
index d99df719..b5d28f8b 100644
--- a/android_app/app/src/main/java/com/health/openscale/core/datatypes/ScaleUser.java
+++ b/android_app/app/src/main/java/com/health/openscale/core/datatypes/ScaleUser.java
@@ -152,6 +152,14 @@ public class ScaleUser {
         return Converters.fromKilogram(initialWeight, scaleUnit);
     }
 
+    public static String getPreferenceKey(int userId, String key) {
+        return String.format("user.%d.%s", userId, key);
+    }
+
+    public String getPreferenceKey(String key) {
+        return getPreferenceKey(getId(), key);
+    }
+
     @Override
     public String toString()
     {
diff --git a/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java b/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java
index 8f0b723b..119dce65 100644
--- a/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java
+++ b/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java
@@ -26,7 +26,6 @@ import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Bundle;
-import android.os.Environment;
 import android.os.Handler;
 import android.os.Message;
 import android.preference.PreferenceManager;
@@ -48,7 +47,6 @@ import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.widget.EditText;
 import android.widget.Toast;
 
 import com.health.openscale.BuildConfig;
@@ -81,6 +79,7 @@ public class MainActivity extends AppCompatActivity
     private MenuItem bluetoothStatus;
 
     private static final int IMPORT_DATA_REQUEST = 100;
+    private static final int EXPORT_DATA_REQUEST = 101;
 
     private DrawerLayout drawerLayout;
     private Toolbar toolbar;
@@ -400,9 +399,7 @@ public class MainActivity extends AppCompatActivity
                 importCsvFile();
                 return true;
             case R.id.exportData:
-                if (PermissionHelper.requestWritePermission(this)) {
-                    exportCsvFile();
-                }
+                exportCsvFile();
                 return true;
             case R.id.shareData:
                 shareCsvFile();
@@ -556,7 +553,7 @@ public class MainActivity extends AppCompatActivity
         else {
             Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
             intent.addCategory(Intent.CATEGORY_OPENABLE);
-            intent.setType("text/*");
+            intent.setType("*/*");
 
             startActivityForResult(
                     Intent.createChooser(intent, getResources().getString(R.string.label_import)),
@@ -564,50 +561,95 @@ public class MainActivity extends AppCompatActivity
         }
     }
 
-    private void exportCsvFile() {
-        AlertDialog.Builder filenameDialog = new AlertDialog.Builder(this);
+    private String getExportFilename(ScaleUser selectedScaleUser) {
+        return String.format("openScale %s.csv", selectedScaleUser.getUserName());
+    }
 
-        filenameDialog.setTitle(getResources().getString(R.string.info_set_filename) + " "
-                + Environment.getExternalStorageDirectory().getPath());
+    private void startActionCreateDocumentForExportIntent() {
+        OpenScale openScale = OpenScale.getInstance(getApplicationContext());
+        ScaleUser selectedScaleUser = openScale.getSelectedScaleUser();
+
+        Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+        intent.setType("text/csv");
+        intent.putExtra(Intent.EXTRA_TITLE, getExportFilename(selectedScaleUser));
+
+        startActivityForResult(intent, EXPORT_DATA_REQUEST);
+    }
+
+    private boolean doExportData(Uri uri) {
+        OpenScale openScale = OpenScale.getInstance(getApplicationContext());
+        if (openScale.exportData(uri)) {
+            String filename = openScale.getFilenameFromUri(uri);
+            Toast.makeText(this,
+                    getResources().getString(R.string.info_data_exported) + " " + filename,
+                    Toast.LENGTH_SHORT).show();
+            return true;
+        }
+        return false;
+    }
+
+    private String getExportPreferenceKey(ScaleUser selectedScaleUser) {
+        return selectedScaleUser.getPreferenceKey("exportUri");
+    }
+
+    private void exportCsvFile() {
+        OpenScale openScale = OpenScale.getInstance(getApplicationContext());
+        final ScaleUser selectedScaleUser = openScale.getSelectedScaleUser();
 
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 
-        final ScaleUser selectedScaleUser = OpenScale.getInstance(getApplicationContext()).getSelectedScaleUser();
-        String exportFilename = prefs.getString("exportFilename" + selectedScaleUser.getId(),
-                "openScale_data_" + selectedScaleUser.getUserName() + ".csv");
+        Uri uri;
+        try {
+            String exportUri = prefs.getString(getExportPreferenceKey(selectedScaleUser), "");
+            uri = Uri.parse(exportUri);
+            getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+        }
+        catch (Exception ex) {
+            uri = null;
+        }
 
-        final EditText txtFilename = new EditText(this);
-        txtFilename.setText(exportFilename);
+        if (uri == null) {
+            startActionCreateDocumentForExportIntent();
+            return;
+        }
 
-        filenameDialog.setView(txtFilename);
+        AlertDialog.Builder exportDialog = new AlertDialog.Builder(this);
+        exportDialog.setTitle(R.string.label_export);
+        exportDialog.setMessage(getResources().getString(R.string.label_export_overwrite,
+                openScale.getFilenameFromUri(uri)));
 
-        filenameDialog.setPositiveButton(getResources().getString(R.string.label_export), new DialogInterface.OnClickListener() {
-            public void onClick(DialogInterface dialog, int id) {
-                String fullPath = Environment.getExternalStorageDirectory().getPath() + "/" + txtFilename.getText().toString();
-
-                if (OpenScale.getInstance(getApplicationContext()).exportData(fullPath)) {
-                    prefs.edit().putString("exportFilename" + selectedScaleUser.getId(), txtFilename.getText().toString()).commit();
-                    Toast.makeText(getApplicationContext(), getResources().getString(
-                            R.string.info_data_exported) + " " + fullPath, Toast.LENGTH_SHORT).show();
+        final Uri exportUri = uri;
+        exportDialog.setPositiveButton(R.string.label_yes, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                if (!doExportData(exportUri)) {
+                    prefs.edit().remove(getExportPreferenceKey(selectedScaleUser)).apply();
                 }
             }
         });
-
-        filenameDialog.setNegativeButton(getResources().getString(R.string.label_cancel), new DialogInterface.OnClickListener() {
-            public void onClick(DialogInterface dialog, int id) {
+        exportDialog.setNegativeButton(R.string.label_no, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
+                startActionCreateDocumentForExportIntent();
+            }
+        });
+        exportDialog.setNeutralButton(R.string.label_cancel, new DialogInterface.OnClickListener() {
+            @Override
+            public void onClick(DialogInterface dialog, int which) {
                 dialog.dismiss();
             }
         });
 
-        filenameDialog.show();
+        exportDialog.show();
     }
 
     private void shareCsvFile() {
         final ScaleUser selectedScaleUser = OpenScale.getInstance(getApplicationContext()).getSelectedScaleUser();
 
         File shareFile = new File(getApplicationContext().getCacheDir(),
-                String.format("openScale %s.csv", selectedScaleUser.getUserName()));
-        if (!OpenScale.getInstance(getApplicationContext()).exportData(shareFile.getPath())) {
+                getExportFilename(selectedScaleUser));
+        if (!OpenScale.getInstance(getApplicationContext()).exportData(Uri.fromFile(shareFile))) {
             return;
         }
 
@@ -629,8 +671,30 @@ public class MainActivity extends AppCompatActivity
     public void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);
 
-        if (requestCode == IMPORT_DATA_REQUEST && resultCode == RESULT_OK && data != null) {
-            OpenScale.getInstance(getApplicationContext()).importData(data.getData());
+        if (resultCode != RESULT_OK || data == null) {
+            return;
+        }
+
+        OpenScale openScale = OpenScale.getInstance(getApplicationContext());
+
+        switch (requestCode) {
+            case IMPORT_DATA_REQUEST:
+                openScale.importData(data.getData());
+                break;
+            case EXPORT_DATA_REQUEST:
+                if (doExportData(data.getData())) {
+                    try {
+                        getContentResolver().takePersistableUriPermission(
+                                data.getData(), Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+                        String key = getExportPreferenceKey(openScale.getSelectedScaleUser());
+                        PreferenceManager.getDefaultSharedPreferences(this).edit()
+                                .putString(key, data.getData().toString()).apply();
+                    }
+                    catch (Exception ex) {
+                        // Ignore
+                    }
+                }
+                break;
         }
     }
 
@@ -646,13 +710,6 @@ public class MainActivity extends AppCompatActivity
                     permissionGranted = false;
                 }
                 break;
-            case PermissionHelper.PERMISSIONS_REQUEST_ACCESS_WRITE_STORAGE:
-                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                    exportCsvFile();
-                } else {
-                    permissionGranted = false;
-                }
-                break;
         }
 
         if (!permissionGranted) {
diff --git a/android_app/app/src/main/res/values-ca/strings.xml b/android_app/app/src/main/res/values-ca/strings.xml
index 3713dcd6..1e50722f 100644
--- a/android_app/app/src/main/res/values-ca/strings.xml
+++ b/android_app/app/src/main/res/values-ca/strings.xml
@@ -78,7 +78,6 @@
     <string name="info_data_all_deleted">Totes les entrades eliminades</string>
     <string name="info_data_exported">Dades exportades a</string>
     <string name="info_data_imported">Dades importades de</string>
-    <string name="info_set_filename">Establir nom d\'arxiu a</string>
     <string name="info_enter_value_cm">Valor en cm</string>
     <string name="info_enter_value_unit">Valor en</string>
     <string name="info_enter_comment">Comentari opcional</string>
diff --git a/android_app/app/src/main/res/values-de/strings.xml b/android_app/app/src/main/res/values-de/strings.xml
index c48e2b54..4e24dd87 100644
--- a/android_app/app/src/main/res/values-de/strings.xml
+++ b/android_app/app/src/main/res/values-de/strings.xml
@@ -18,7 +18,6 @@
     <string name="info_is_not_available">ist nicht verfügbar</string>
     <string name="info_no_selected_user">Kein Benutzer vorhanden. Bitte erzeugen Sie ein neuen Benutzer unter Einstellungen.</string>
     <string name="info_on_date">am</string>
-    <string name="info_set_filename">Setzte Dateiname auf</string>
     <string name="label_birthday">Geburtstag</string>
     <string name="label_bluetooth_enable">Suche nach Waage beim Start</string>
     <string name="label_bluetooth_title">Bluetooth</string>
diff --git a/android_app/app/src/main/res/values-es/strings.xml b/android_app/app/src/main/res/values-es/strings.xml
index a71bb47e..71961e04 100644
--- a/android_app/app/src/main/res/values-es/strings.xml
+++ b/android_app/app/src/main/res/values-es/strings.xml
@@ -78,7 +78,6 @@
     <string name="info_data_all_deleted">Todas las entradas borradas</string>
     <string name="info_data_exported">Datos exportados a</string>
     <string name="info_data_imported">Datos importados de</string>
-    <string name="info_set_filename">Establecer nombre de archivo a</string>
     <string name="info_enter_value_cm">Introduzca valor en cm</string>
     <string name="info_enter_value_unit">Introduzca valor en</string>
     <string name="info_enter_comment">Introduzca un comentario opcional</string>
diff --git a/android_app/app/src/main/res/values-fr/strings.xml b/android_app/app/src/main/res/values-fr/strings.xml
index be1449cc..4180d988 100644
--- a/android_app/app/src/main/res/values-fr/strings.xml
+++ b/android_app/app/src/main/res/values-fr/strings.xml
@@ -72,7 +72,6 @@
     <string name="info_data_all_deleted">Toutes les entrées ont été supprimées de la base de données</string>
     <string name="info_data_exported">Données exportées vers</string>
     <string name="info_data_imported">Donnéees importées depuis</string>
-    <string name="info_set_filename">Définir le nom du fichier vers</string>
     <string name="info_enter_value_cm">Entrez la valeur en cm</string>
     <string name="info_enter_value_unit">Entrez la valeur en</string>
     <string name="info_enter_comment">Ajouter un commentaire optionnel</string>
diff --git a/android_app/app/src/main/res/values-ja/strings.xml b/android_app/app/src/main/res/values-ja/strings.xml
index 64fdc0e7..767d01ee 100644
--- a/android_app/app/src/main/res/values-ja/strings.xml
+++ b/android_app/app/src/main/res/values-ja/strings.xml
@@ -54,7 +54,6 @@
     <string name="info_on_date">でした -</string>
     <string name="info_no_selected_user">ユーザーは存在しません！設定で新しいユーザを入れてください</string>
     <string name="label_add_user">ユーザーの追加する</string>
-    <string name="info_set_filename">にファイル名を設定</string>
     <string name="label_enable_labels">メモの上にデータ点</string>
     <string name="info_is_visible">表示されています</string>
     <string name="info_is_not_visible">表示されていません</string>
diff --git a/android_app/app/src/main/res/values-nl/strings.xml b/android_app/app/src/main/res/values-nl/strings.xml
index 66485982..ed3f06c0 100644
--- a/android_app/app/src/main/res/values-nl/strings.xml
+++ b/android_app/app/src/main/res/values-nl/strings.xml
@@ -80,7 +80,6 @@
     <string name="info_data_all_deleted">Alle database vermeldingen verwijderd</string>
     <string name="info_data_exported">Data geexporteerd naar</string>
     <string name="info_data_imported">Data geinporteerd van</string>
-    <string name="info_set_filename">Zet bestandsnaam op</string>
     <string name="info_enter_value_cm">Geef waarde op cm\'s in</string>
     <string name="info_enter_value_unit">Geef waaarde op</string>
     <string name="info_enter_comment">Voeg een optionele opmerking toe.</string>
diff --git a/android_app/app/src/main/res/values-pl/strings.xml b/android_app/app/src/main/res/values-pl/strings.xml
index c0ecdc96..0ded86a5 100644
--- a/android_app/app/src/main/res/values-pl/strings.xml
+++ b/android_app/app/src/main/res/values-pl/strings.xml
@@ -75,7 +75,6 @@
     <string name="info_data_all_deleted">Wszytkie wpisy w bazie danych usunięte</string>
     <string name="info_data_exported">Dane wyeksportowane do</string>
     <string name="info_data_imported">Dane zaimportowane z</string>
-    <string name="info_set_filename">Ustaw nazwę pliku na</string>
     <string name="info_enter_value_cm">Wprowadź wartość w cm</string>
     <string name="info_enter_value_unit">Wprowadź wartość w</string>
     <string name="info_enter_comment">Wprowadź opcjonlany komentarz</string>
diff --git a/android_app/app/src/main/res/values-pt/strings.xml b/android_app/app/src/main/res/values-pt/strings.xml
index f7a34d45..152e4cf1 100644
--- a/android_app/app/src/main/res/values-pt/strings.xml
+++ b/android_app/app/src/main/res/values-pt/strings.xml
@@ -44,7 +44,6 @@
     <string name="info_no_evaluation_available">Valor não pode ser processado</string>
     <string name="info_on_date">em</string>
     <string name="info_no_selected_user">Nenhum usuário existe. Por favor, crie um novo usuário em Configurações.</string>
-    <string name="info_set_filename">Definir nome de arquivo para</string>
     <string name="info_step_on_scale">Por favor suba na balança para medidas de referência</string>
     <string name="label_add_user">Adicionar usuário</string>
     <string name="label_backup">Backup</string>
diff --git a/android_app/app/src/main/res/values-sk/strings.xml b/android_app/app/src/main/res/values-sk/strings.xml
index 33cbf0da..6d3ddb4b 100644
--- a/android_app/app/src/main/res/values-sk/strings.xml
+++ b/android_app/app/src/main/res/values-sk/strings.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="title_overview">Prehľad</string>
+  <string name="title_overview">Prehľad</string>
   <string name="title_graph">Graf</string>
   <string name="title_table">Tabuľka</string>
   <string name="title_statistics">Štatistiky</string>
@@ -64,7 +64,6 @@
   <string name="info_data_all_deleted">Všetkých položky boli vymazané z databázy</string>
   <string name="info_data_exported">Údaje boli exportované do</string>
   <string name="info_data_imported">Údaje boli importované z</string>
-  <string name="info_set_filename">Nastaviť názov súboru na</string>
   <string name="info_enter_value_cm">Zadajte hodnotu v cm</string>
   <string name="info_enter_value_unit">Zadajte hodnotu v palcoch</string>
   <string name="info_enter_comment">Zadajte voliteľný komentár</string>
diff --git a/android_app/app/src/main/res/values-sv/strings.xml b/android_app/app/src/main/res/values-sv/strings.xml
index 768de44e..d7aecd25 100644
--- a/android_app/app/src/main/res/values-sv/strings.xml
+++ b/android_app/app/src/main/res/values-sv/strings.xml
@@ -80,7 +80,6 @@
     <string name="info_data_all_deleted">Alla databasposter borttagna</string>
     <string name="info_data_exported">Data exporterad till</string>
     <string name="info_data_imported">Data importerad från</string>
-    <string name="info_set_filename">Sätt filnamn till</string>
     <string name="info_enter_value_cm">Ange värde i cm</string>
     <string name="info_enter_value_unit">Ange värde i</string>
     <string name="info_enter_comment">Ange en frivillig kommentar</string>
@@ -187,5 +186,6 @@
     <string name="label_set_default_order">Ställ in standardordning</string>
 
     <string name="label_weeks_view">Veckovy</string>
+    <string name="label_export_overwrite">Skriv över föregående export \"%s\"?</string>
 
 </resources>
diff --git a/android_app/app/src/main/res/values-tr/strings.xml b/android_app/app/src/main/res/values-tr/strings.xml
index 84fa4788..7e954e48 100644
--- a/android_app/app/src/main/res/values-tr/strings.xml
+++ b/android_app/app/src/main/res/values-tr/strings.xml
@@ -76,7 +76,6 @@
     <string name="info_data_all_deleted">Veri tabaný giriþi silindi</string>
     <string name="info_data_exported">Veri dýþarý aktarma</string>
     <string name="info_data_imported">Veri içeri aktarma</string>
-    <string name="info_set_filename">Dosya adýný ayarla</string>
     <string name="info_enter_value_cm">Deðeri cm olarak girin</string>
     <string name="info_enter_value_unit">Ýçine deðer girin</string>
     <string name="info_enter_comment">Ýsteðebaðlý açýklama girin</string>
diff --git a/android_app/app/src/main/res/values/strings.xml b/android_app/app/src/main/res/values/strings.xml
index d45e0d5f..b3d5023e 100644
--- a/android_app/app/src/main/res/values/strings.xml
+++ b/android_app/app/src/main/res/values/strings.xml
@@ -88,7 +88,6 @@
     <string name="info_data_all_deleted">All database entries deleted</string>
     <string name="info_data_exported">Data exported to</string>
     <string name="info_data_imported">Data imported from</string>
-    <string name="info_set_filename">Set filename to</string>
     <string name="info_enter_value_cm">Enter value in cm</string>
     <string name="info_enter_value_unit">Enter value in</string>
     <string name="info_enter_comment">Enter an optional comment</string>
@@ -211,6 +210,7 @@
     <string name="label_measurement_order">Measurement order</string>
     <string name="label_press_hold_reorder">Press and hold to reorder</string>
     <string name="label_set_default_order">Set default order</string>
+    <string name="label_export_overwrite">Overwrite previous export \"%s\"?</string>
 
 
 </resources>