Once the data is over-written there is no means to recover your data.
Data can be recovered from formated hard drive, software malfunction, viruses. or sabotage by using data recovery software.
If you are not sure whether data is over-written or not. Then In that case you can try Stellar Phoenix FAT & NTFS data recovery software
Download the demo version from:http://www.stellarinfo.com/partition-recovery.htm
, scan your hard drive. If you are able to see your data through scan result it means it has not been overwritten and you can recover your data by getting the full version.
Hope you will get back your data.