When sorting the files into folders the tool changes the name of the files with special characters an umlauts into ascii-strings.

Different names in different operating systems (Mac, Windows, Linux)
Special characters like umlauts, quotation marks and dots are replaced with _
Many endings changes e.g from .JPG and -jpeg i-> .jpg
Big and small special letters (in case of special characters or umlauts) are handled differently (convert into different chracters like ö=_ and Ö= %)
Example: L___%9Fnig_-_D__litz_2.jpg

The desired result would be that the file names are kept intact or at least readable so the jury members can read the name and search for the in Commons, if needed.