Android: No matter how much space you have on your phone or tablet, you'll eventually fill it up. If you're running low on space, Memory Map will show you what's using up the all that storage.
We've covered other utilities like DiskUsage to find the space hogs, but this app has a nicer interface and modern touch gestures. Spreading lets you go deep into a folder to see which files are taking up the most space.
Memory map colour codes the files so you can find just your music or video files (and leave important system files alone). It even checks your internal storage and any SD cards, and lets you delete right from the app. Unfortunately, it won't let you move files from internal storage to an SD card. Memory Map comes in free ad-supported and pro versions.