Is your Android device lacking a native file manager? Check these out51
Devices like the LG G2 come with a pre-loaded file manager and it is up for the task. Since that device does support microSD card storage, file management is easier to manage. With Android 4.4 KitKat though, SD card storage is not as accessible.
These apps, when applicable can help you “manage” what is there, but unless your device is rooted, you may not be able to move any files there. At least you have a way to see how things are organized though. To make changes you will likely still need to connect your microSD card, or smarphone to a computer.
In the meantime, check out 6 nice looking file managers available for Android. As you might imagine, there are dozens and dozens to choose from. They all have something to offer, so at least let this serve as a starting point in your search for the perfect file manager.