What mean buttons in Odin 3.07 and lower: USB data cable / Make sure to have at least 50-60% battery power.You need correct Android ROM files (PIT and TAR) /Custom ROM / Stock ROM (Check the device support, Download Stock ROM and extract it on the PC).Install the latest Samsung USB drivers.Some mistakes will result in permeant BRICK. Pick Correct ROM, Files, and tutorial.It's recommended to use the latest tool available.Install the latest USB drivers(mainboard, usb port etc.) for your PC.Gain root access by flashing root packages.Flashing Stock firmware and Custom firmware.It Can communicate with a smartphone using USB. Odin is a program run on a PC that can load and flash firmware image files (“ROMs”) onto Samsung smartphones and tablets. Odin is the ROM Flashing tool for SAMSUNG Android Smartphone and tablets devices. Odin is lightweight, yet powerful and widely used by Android users. Odin is the most commonly used Samsung flashing tool which is leaked from Samsung itself.