Data recovery software is a program that can be used to recover lost or deleted files from your computer. When a file is deleted, the data is not actually erased from your hard drive. Instead, the file space occupied is simply marked as empty and available for new data. As long as the old data is not overwritten, it can be recovered using special software. Data recovery tools work by scanning your hard drive for any traces of the lost data. Once they have located the data, they can then rebuild the files and save them to a new location. In most cases, data recovery software can successfully recover lost files with little to no damage. However, if the data has been overwritten, it will be much more difficult to recover.