Spreading lets you go deep into a folder to see which files are taking up the most space.

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.

Memory Map - Disk Cleaner(Free, $3.35 for ad-free) | Google Play viaHow-To Geek