Here's how you can download the free DiskUsage app for Android. DiskUsage makes it easy and fast to see which files and folders are consuming storage space on your Android devices.
You can see a diagram with directories and subdirectories, thus making it easy to see what is using up the space on your Android phone or tablet.
Download and Install DiskUsage for Android
1. Go to the Google Play page.
2. Tap the Install button.