The random numbers you see are actually the sector numbers. During a deep scan or scan using the “physical disk” option, the software will scan your device using the raw recovery technique (sector-by-sector search). A combination of alphanumeric characters is displayed instead of the original file names.
In the case of images, during preview, you can see the image resolution and other details if they are available. However, in case of other file formats, you will only be able to see the sector numbers.
