Failed to mount system FRP On Samsung Galaxy S7 Edge G935F

+ they are stuck "Samsung booting logo" if they are booted regular mode

+ they are G935F model: if they are flashed any firmware versions via Odin, it will be stuck in Sytem.img partition

+ in Recovery mode: they will show the error: E: failed to mount /system (Invalid argument)

+ in Download mode: FRP lock is ON (Samsung S7 Edge is logged in an google account)

+ they can't be flashed any files.