X-plore File Manager
An easy-to-use and professional file manager with a dual-pane tree view and file transfer between devices.
Pros & Cons:
The Ice Cream Sandwich and Jelly Bean versions of the Android system have not come with a file manager yet. It's probably most Android users have been craving for and yet it's not built in.
Unless you're having a file manager added on by your device manufacturer, you would tend to need one to browse the files inside your device. Or if you're not happy with the file manager that the supplier added for you, then why not install one that's most suited for you?
X-plore File Manager is one of the best in this review Best Free File Manager for Android at time of preparing this list. Get this app if you like a dual-pane file manager with a tree view. It allows you to transfer files easily between folders on the same device as you can have your device folder on one side of the split screen and your external storage folder on the other.
It shows the total memory size and amount of free space. When you drill further into a folder, it shows you file sizes. Besides using the menu buttons, you can long press a folder or file to rename, copy, move, delete, create zip, show details and more.
A number of other features are also useful such as setting favorite folders, built-in viewers for images, video, audio and text, sharing files and cloud storage access to Google Drive, Dropbox, SkyDrive, etc.
This app works pretty well in particular if your device screen isn't too small.
X-plore File Manager was reviewed by Gizmos Freeware on