M 8 Eye user here . Yes , I have to agree . the System takes up a lot of free space . But since you upgraded to Android 6 . 0 , there ' s a feature called Adaptable Storage . This feature merges your Internal Storage with External Storage SD Card . You can go to Settings Storage USB . Tap on your SD card and then Format as Internal . Before you do that , I suggest you to get a UHS 1 type SD Card . and if you already have a UHS 1 SD card move your contents somewhere as you have to FORMAT your SD . I have a total of 74 GB as my internal memory right now You can know more from here m a rshmallowadoptablestorage <| sep |> Uhh l have 700 myself and there was some kind of a count down thing , waiting my mobo to get back from RMA so can ' t try it myself