I have a doubt The total space on my phone memory is 150.5 MB  so using this app I discovered the apps on my sdcard are taking up 45 MB and the apps on my phone are taking 35.2 MB but I still have 90 MB free. I do not understand why the three add up to 150 MB  even it displays the it as 170 MB. Could spmeone please explain this.
November 17 2014