private static async Task ExportDB()
        {
            try
            {
                File sd   = Android.OS.Environment.ExternalStorageDirectory;
                File data = Android.OS.Environment.DataDirectory;
                if (sd.CanWrite())
                {
                    String currentDBPath = "/user/0/com.companyname/files/.local/share/TodoSQLite.db3";
                    String backupDBPath  = "BackupHorarios";
                    File   currentDB     = new File(data, currentDBPath);
                    File   backupDB      = new File(sd, backupDBPath);
                    if (currentDB.Exists())
                    {
                        FileChannel SourcePath      = new FileInputStream(currentDB).Channel;
                        FileChannel DestinationPath = new FileOutputStream(backupDB).Channel;
                        await DestinationPath.TransferFromAsync(SourcePath, 0, SourcePath.Size());

                        SourcePath.Close();
                        DestinationPath.Close();
                    }
                }
            }
            catch (Exception e)
            {
            }
        }