You need to wait for a firmware update to your phone and then accept Extras+info app update. The extras+info app update installs the Storage Check app to the Lumia device. It will be visible in the Settings menu.
- Why am I unable to see the app update notification on Windows Phone Store tile?
- Can I download and save music or video email attachments to my Nokia Lumia phone?
- My phone does not vibrate properly
- I can see a symbol with a circle inside it the status bar. What is that?
- Why does my Nokia Lumia automatically switch on when it is charging?