Applied model
1. Americas: IFP**50 - Gen 1, IFP**50 - Gen 2, IFP**50 - Gen 3, IFP**70
2. Asia Pacific & Africa: IFP**50, IFP**50-2, IFP**50-3, IFP**70
3. Europe: IFP**50, IFP**50-2EP, IFP**50-3EP, IFP**70
Please use remote control to enter debug menu via pressing INPUT 9 9 1 in sequence, then go to Other Setting--àUSB Disk Enable and turn it to OFF.
This will only disable USB drive functionality but NOT USB peripheral devices like keyboard or mouse.