Once a file is deleted from the Trash Bin, such as when you empty it to reclaim some storage space on your hard drive, you might think it is gone forever. But this is not always the case. You can recover deleted files from an emptied trash bin.
When you first empty the Trash, the operating system simply marks the space that the files formerly occupied as available for reuse. The files are still physically on the disk, though no longer logically accessible through the operating system. As long as the files are not overwritten, there is a good chance that they can be recovered.