diff --git a/res/values/strings.xml b/res/values/strings.xml
index 3f21881ca..d928ca08f 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -677,6 +677,7 @@
     <string name="pref_backup">Backup</string>
     <string name="pref_backup_explain">Back Up Chats to External Storage</string>
     <string name="pref_backup_export_explain">A backup helps you to set up a new installation on this or on another device.\n\nThe backup will contain all messages, contacts and chats and your end-to-end Autocrypt setup. Keep the backup file in a safe place or delete it as soon as possible.</string>
+    <string name="pref_backup_export_all">Backup all accounts</string>
     <string name="pref_backup_export_start_button">Start Backup</string>
     <string name="pref_backup_written_to_x">Backup written successfully to \"%1$s\".</string>
     <string name="pref_managekeys_menu_title">Manage Keys</string>
diff --git a/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java b/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java
index e823f41e9..2d807d537 100644
--- a/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java
+++ b/src/org/thoughtcrime/securesms/preferences/ChatsPreferenceFragment.java
@@ -265,6 +265,13 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
   }
 
   private void performBackup() {
+    View gl = View.inflate(getActivity(), R.layout.dialog_with_checkbox, null);
+    CheckBox confirmCheckbox = gl.findViewById(R.id.dialog_checkbox);
+    TextView msg = gl.findViewById(R.id.dialog_message);
+
+    msg.setText(getString(R.string.pref_backup_export_explain));
+    confirmCheckbox.setText(R.string.pref_backup_export_all);
+
     Permissions.with(getActivity())
             .request(Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE) // READ_EXTERNAL_STORAGE required to read folder contents and to generate backup names
             .alwaysGrantOnSdk30()
@@ -273,9 +280,15 @@ public class ChatsPreferenceFragment extends ListSummaryPreferenceFragment {
             .onAllGranted(() -> {
               new AlertDialog.Builder(getActivity())
                       .setTitle(R.string.pref_backup)
-                      .setMessage(R.string.pref_backup_export_explain)
+                      .setView(gl)
                       .setNegativeButton(android.R.string.cancel, null)
-                      .setPositiveButton(R.string.pref_backup_export_start_button, (dialogInterface, i) -> startImex(DcContext.DC_IMEX_EXPORT_BACKUP))
+                      .setPositiveButton(R.string.pref_backup_export_start_button, (dialogInterface, i) -> {
+                          if (confirmCheckbox.isChecked()) {
+                            // TODO: backup all accounts
+                          } else {
+                            startImex(DcContext.DC_IMEX_EXPORT_BACKUP);
+                          }
+                      })
                       .show();
             })
             .execute();