App Name: Astro File Manager

Description: Astro File Manager is one of the main file management tools available for Android devices. The main program is free. There is also a bluetooth module and a smb module that can be downloaded. With this app one can work with file management, file and/or app backup, image and text viewers, SFTP, Zip Tar, downloader, thumbnails, search files, application manager, task manager, attachments. A new version is currently being worked on.

Cost: Free / $3.99 for Pro (ad removal)

Developer: Metago

ASTRO File Manager – (a bit old but good overview)

Astro File Manager For Android : Review And How-To -AbcTrick

Android App Review: Astro File ManagerĀ  (video)- Droidcell

ASTRO File Manager Reaches 15 Million Downloads as Version 3.0 is Prepared – Phandroid (press release on app)