Creality LD-002H

Hi,
I'm trying to set up a brandnew SLA-printer, the Creality SD-002H.
Unfortunately, the files on the delivered USB aren't indeicated in the LCD-screen and if I create brandnew one (with the software chitubox V1.7.0) and using the correct file-ending .ctb (AND short file name to be sure), NOTHING is indicated.

On the manufacturer homepage NO firmware files are available so far.

I would like to download the original file structure of the USB-stick, but again, NO source on the Intenret found so far.

SOS!