
Your mobile device can carry an awful lot of data, and there may come a time when you want to dig in and deal directly with it. It can even act as a portable hard drive and house any sort of important files you might need in your pocket (and not just on some far-away cloud). It can juggle everything from PDFs and PSDs to presentations and podcasts. After all, your Android device is a productivity powerhouse. We may not come face to face with our phones' file systems too often, but it's valuable to know they're there - and to know how they can work for us when the need arises.

Beneath all that surface-level stuff, though, our modern mobile devices are filled with files - folders upon folders of 'em! - just like the clunky ol' computers we've relied upon for ages.

When you think about your smartphone, apps and interfaces are probably the first things that come to mind.
