File Manager allows you to view and edit the files held in your phone's storage.
Lots of phones feature file managers, but this one gives you access - if allowed - to locations that usually stay hidden. With File Manager you can navigate around your phone's file trees and add or delate files as you wish.
This freedom means you can kind of hide files away in unusual places on your Phone's memory, and also that care must be taken with deleting files. You might harm the functionality of some other applications or eve your phone itself.
File Manager is a simple application that gives you full access to your phone's memory. Use with care!