mAP 2nD - USB issue

Hello ,
I’m trting to connect to my RouterBOARD mAP 2nD a disk on key 4/8/16GB
but it doesn’t seem to recognize it -
but when I connect a usbToRS232 cable - it show on port as usb1
I have also try to connect a modem usb dongle -
it’s turn on - but no usb on the port

  • I’m using a microUSB male to A usb female connector in order to test everything

what could be the problem?

Thanks ,