The files on the delivered USB aren't indeicated in the LCD-screen

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!geometry dash online