Nokia Storage Check app can be used to show a detailed breakdown of the phone memory usage and do something about it. Space used by apps can be viewed in further detail, including their data. This allows you to make educated decisions on removing apps that might be big or bring little value to you given their size on ‘disk’. Some temporary files can be removed by tapping the ‘clear’ button.
Nokia is updating their app at a constant phase, and this new update 1.2.1 does not bring any new feature but comes with bug fixes to make the experience better.
Download it here from Windows Phone Store for free from your Lumia device.