How do you recover files after they have been erased

How do you recover files after have been erased

Use “Undelete” to recover deleted files after have been erased Windows 7/8/8.1

Use “Full Scan” mode to recover erased files which can not be found with “undelete” ,show as raw partition,partitons which are not NTFS,nor exfat,nor fat32. With deep and full scan