This tool looks for and installs the latest firmware and the settings for all USB models (CT 1500 +, 2100 + CT, CT 2500 +, 3100 + CT, CT 5000/C/C +, 5100 + CT, CT 6600) on USB Stick ... A feature to FAT 32 formation is also installed, which is required if the receiver does not recognize the HDD!