To update the firmware, you need to do the following: 1) Write the firmware file "SVEN_SB-2055_*.MVA" to a USB flash drive (up to 4gb). The USB flash drive must be formatted in FAT32, the USB flash drive must contain only the firmware file; 2) Turn on the soundbar. Insert the USB flash drive into the USB port of the soundbar; 3) The soundbar will automatically update the software. Once the update is complete, the soundbar will switch to ST-BY mode. 4) Remove the USB flash drive from the USB port of the soundbar; 5) The update is complete.