If one uses Recover4all® soon after deletion and a deleted file shows up in the program, one has a good chance to recover it. But deleted files can not always be recovered with Recover4all®. They will sooner or later be overwritten, which makes them unrecoverable with software. Furthermore, the information where the data of a file is exactly located on the disk gets lost when a file is deleted. Recover4all® can in many but not all cases guess this information and recover the file automatically. Though also very large files can be successfully recovered, recovery chances tend to get lower for larger files.