This is the Software Publisher's description.
O&O DiskRecovery looks for and recovers data that’s been unintentionally lost as a result of human error or defective software! It combs every sector of the hard disk, the memory card, or the USB Stick to find lost files.
Along with continued maintenance and enhancement of the already existing program components there are many new and helpful functions available. From now on, you can recover an unlimited number of files per scan using O&O DiskRecovery Professional Edition. If your data was lost before you had a chance to install O&O DiskRecovery, the simplified instant installation can help you to recover your data.
If you’d like to recover data that’s been accidentally deleted, immediately stop all further write activity on the storage volume involved, because only files that have not been overwritten are capable of being accurately restored. Even looking for a suitable data recovery product on the Internet and downloading it can overwrite important data sectors and make recovering data more difficult, if not impossible. That’s why it’s so important to have O&O DiskRecovery already installed on your computer, before trouble strikes.
If O&O DiskRecovery is not already installed on your computer when trouble strikes, the instant installation is ready to help you. All you’ll need is a second computer and a removable drive (e.g., USB Stick, external hard disk). Start the installation on the second computer and save the “Instant Installation” on the removable drive. You can then connect this drive to the target computer on which you want to recover data, and run O&O DiskRecovery from there. Doing so will let you avoid a complete installation on the target computer, which in turn could possibly overwrite important sectors of the hard disk that are needed for a restoration.
The three integrated search methods use different technologies for data recovery, which complement each other perfectly. For quick searches, you can use the search algorithm of O&O UnErase, which completes a scan for files, even on very large hard drives, in no time. The advanced features of the special search algorithms in O&O FormatRecovery make it possible to find and then ignore defective sectors. This in turn facilitates data recovery on a drive that is damaged yet still accessible. For the sector-based deep scan, we recommend the use of the search algorithms in O&O DiskRecovery.
Upon completion of the scanning process, you’ll be able to preview the recovered data. O&O DiskRecovery supports various picture and text formats for the preview function, including JPEG, BMP, TIFF, TXT.