Problems recognition SD-card


I recently purchased the Vertex Nano 3D printer(VM8600).
Now my SD card is not recognized by the printer. The g code must be read in to calibrate the axes.
I have tried several cards, including reformatting.
I also followed and followed the instructions on the forum, which also did not help. (Init Card, change Card)

What can I do now to have the SD card recognized or do I need a specific Card?


How is the SD Card formatted?
Is must be in FAT32

Best Regards,