Can't Update new Firmware

about 1 year ago I updated my ilive system from V1.83 to V1.90. Now a days I try to the newest version, but my surfaces T112 and T80 can’t detect the USB drive. I already copy the Firmware folder to my root directory USB drive. How I can update it with the new one.

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thank you for any suggestion and after investigation of my problems, I found that my surface can’t detect the USB stick. It can be seen on the screen at below there is no icon came up. Finally I used new USB stick and copy the original file from allen-heath website. After unzip the file and copy it to the USB stick, now I successfully update the firmware V1.94
Just share:

  1. copy the folder “firmware” containing all files needed for updating to the root directory of USB stick.
  2. plug to the USB drive on the surface and wait about 3 seconds until USB icon comes up on screen below
  3. go to menu UTILITY > Firmware > Update Firmware
    It will take about 3 minutes since iLive will update TouchScreen, Mixrack and Surface in once.