Source: Cameron Summerson, HowToGeek.com, December 14, 2017
When you picked up your shiny new Android device, you probably thought “yeah, this has plenty of storage.
I’ll never fill it up!” But here you are, some number of months later with a full phone and no clue why. No worries: here’s how you can figure out where the space hogs are.
You can use built-in features to figure this out, or third-party apps. I find the easiest and most straightforward tools to use are often the ones included in Android itself, so we’ll start with those, before showing you some of your other options.