Core/WiiRoot: Fix NetPlay full Wii save sync not copying all the saves back to main NAND

Source/Core/Core/WiiRoot.cpp

@@ -252,8 +252,8 @@ void CleanUpWiiFileSystemContents()
     WARN_LOG(CORE, "Failed to copy Mii database to the NAND");
   }
 
-  const u64 title_id = SConfig::GetInstance().GetTitleID();
-
+  for (const u64 title_id : ios->GetES()->GetInstalledTitles())
+  {
     const auto session_save = WiiSave::MakeNandStorage(ios->GetFS().get(), title_id);
 
     // FS won't write the save if the directory doesn't exist
@@ -275,4 +275,5 @@ void CleanUpWiiFileSystemContents()
     WiiSave::Copy(user_save.get(), backup_save.get());
     WiiSave::Copy(session_save.get(), user_save.get());
   }
+}
 }  // namespace Core