File Explorer is a free, full-featured file and application manager.

It provides access to pictures, music, video, documents, and other files on both your Android devices and your computers.
File Explorer allows Android users, no matter where they are, to manage their resources freely. You can access all of your files from your mobile device and share them with others. This app makes it easy to stay connected over 3G, 4G, EDGE, or Wi-Fi to share with friends, upload photos, and watch videos.