In case people in this thread are still having issues, or new owners experience the same, here's what worked for me: Make sure you have a fat32 formatted USB stick Place the *.img file on it (mine was empty in case it makes a difference) Do not rename the file (mine was named "M-T9549GGAA-1008.1[205C].img") Unplug the USB cable from your computer to the monitor This is most people's issue I think Possible explanation; When the monitor disconnects the drive to gain direct access, windows re-connects the drive, causing the  "No USB devices detected" error - because the monitor can in fact not see a USB drive Run the update function, should detect the file and update It is a shame that Samsung doesn't offer proper support, and that us "common folks" have to fend for our selves, especially considering the pricetag on these monitors!   @ddaniel51 @userDNVYlwhx7X @userKv0NXQK7LG @user1xkXJ0ttbN @KrazePendragon  ... View more