To access Command Prompt Mode (Proxmark), Put your device in PC-Mode on the iCopy-XS, On your computer a new drive letter will show up and will have a bunch of files. Click on Run, Type the com port number your device is connected to and click enter.
If you dont know your com port # that the device is connected to, Go to Device Manager on your computer, Select Ports (COM LPT). A list of all the com ports that are being used on your computer are listed.
Type Help at anytime to view the commands that are available to you.