: Use a FAT32-formatted USB stick (8GB to 32GB is ideal).
Updating a head unit is a delicate process. If the wrong version is used, it can "brick" the device (make it permanently unusable). GF200821-TRL-1.2-GG.rar
: Unzip the .rar file and copy the contents (usually files like update.img or a folder named FYT ) directly to the root of the USB drive. : Use a FAT32-formatted USB stick (8GB to 32GB is ideal)
: Plug the drive into the head unit's USB port. Most systems will detect the update automatically and prompt you to start. If not, you may need to enter the "System Settings" and select "Local Update." GF200821-TRL-1.2-GG.rar