The recovery time depends upon the size of the hard disk or volume. If the process is running that means that Stellar Data Recovery Professional software is still scanning the deleted files and you have to wait for recovery process to complete. Once the process is complete you can save the repaired file at any selected location.
When the scanning process is started, the software screen shows the scanning process. This displays scanning status, files found, time elapsed and time left for the scanning process on the selected drive.