How do I update the firmware on the Samsung Xpress M202x printer using a USB connection?
Turn the machine off, connect the USB cable to the printer, then turn the machine back on and confirm it is in ready status. Drag the firmware file and drop it onto the usblist2.exe tool, which will start the firmware update automatically. When the upgrade is complete, the machine will automatically reboot. (Page 65)
From the official HP Samsung Xpress SL M2021 Laser Printer Series manual, page 65
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