The only wise option to have when you discover that you have lost data, is to stop using the medium any more. There are chances of further data loss if you continue using it. Although, data recovery professionals can try to back up the lost data, without having enough knowledge, it is better not to try this on your own. People have used the software that they had downloaded from a suspicious web site and the results have been totally negative. Moreover, many people have tried to restore the data by freezing the drives only to increase the loss of data. Therefore, it must be noted that the only useful trick to save further data loss when you have lost data is to immediately stop using the media from which data has lost. If you do so, and you bring the media to us, probably we will be able to help. However, if you have damaged the media by trying to recover all data, even we may be unable to help you recover the data that has been lost.