diff --git a/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java b/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
index 8420e343b..e20417aa9 100644
--- a/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
+++ b/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
@@ -19,6 +19,7 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.webkit.MimeTypeMap;
+import android.widget.CheckBox;
 import android.widget.ImageView;
 import android.widget.PopupMenu;
 import android.widget.TextView;
@@ -557,7 +558,16 @@ public class MissionAdapter extends Adapter<ViewHolder> implements Handler.Callb
         );
     }
 
-    public void clearFinishedDownloads() {
+    public void clearFinishedDownloads(boolean delete) {
+        if (delete && mIterator.hasFinishedMissions()) {
+            for(int i=0; i<mIterator.getOldListSize(); i++) {
+                FinishedMission mission = mIterator.getItem(i).mission instanceof FinishedMission ? (FinishedMission) mIterator.getItem(i).mission : null;
+                if (mission != null) {
+                    mDownloadManager.deleteMission(mission);
+                    mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, mission.storage.getUri()));
+                }
+            }
+        }
         mDownloadManager.forgetFinishedDownloads();
         applyChanges();
     }
diff --git a/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java b/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java
index 921eaff5c..edaa01e0f 100644
--- a/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java
+++ b/app/src/main/java/us/shandian/giga/ui/fragment/MissionsFragment.java
@@ -17,6 +17,7 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.CheckBox;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
@@ -189,9 +190,14 @@ public class MissionsFragment extends Fragment {
                 return true;
             case R.id.clear_list:
                 AlertDialog.Builder prompt = new AlertDialog.Builder(mContext);
+                View checkBoxView = View.inflate(this.getContext(), R.layout.delete_files_checkbox, null);
                 prompt.setTitle(R.string.clear_finished_download);
                 prompt.setMessage(R.string.confirm_prompt);
-                prompt.setPositiveButton(android.R.string.ok, (dialog, which) -> mAdapter.clearFinishedDownloads());
+                prompt.setView(checkBoxView);
+                prompt.setPositiveButton(android.R.string.ok, (dialog, which) -> {
+                    CheckBox checkBox = checkBoxView.findViewById(R.id.delete_files_checkbox);
+                    mAdapter.clearFinishedDownloads(checkBox.isChecked());
+                });
                 prompt.setNegativeButton(R.string.cancel, null);
                 prompt.create().show();
                 return true;
diff --git a/app/src/main/res/layout/delete_files_checkbox.xml b/app/src/main/res/layout/delete_files_checkbox.xml
new file mode 100644
index 000000000..cbc6ecd10
--- /dev/null
+++ b/app/src/main/res/layout/delete_files_checkbox.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:paddingHorizontal="15dp">
+
+    <CheckBox
+        android:id="@+id/delete_files_checkbox"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="@string/delete_downloaded_files"/>
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 54ae40d1d..d3899583b 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -587,5 +587,5 @@
     <string name="downloads_storage_use_saf_title">Use SAF</string>
     <string name="downloads_storage_use_saf_summary">The Storage Access Framework allows downloads to an external SD card.\nNote: some devices are not compatible</string>
     <string name="choose_instance_prompt">Choose an instance</string>
-
+    <string name="delete_downloaded_files">Delete downloaded files</string>
 </resources>