might be it is compatibility issue now a days otg coming with model specific buy which compatible to your device, it should mentioned ur device name/ model or atleast mentioned as "supported all type c devices "
Please perform the below mentioned steps to resolve the issue:
* Try different OTG with your device and check by other pen drive.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
