Please confirm you turned on the power before you connect NPS-10 to the computer.
Push the wheel button on the right side of the device.(push for more than 2 sec).
Then check if the Green LED lit, and 'X-copy Ready' message appear on the LCD.
After that, connect NPS-10 to your computer(rear side USB ports is preferred). You need to connect Type-C port of NPS-10 to Type-A port of the computer.
If connected, NPS-10 detect the connection and ask you selecting 'Computer I/F'. Push the button to connect to the computer.