ASTRO File Manager
There are several versions of this file manager: Cloud, SMB, and Pro. As you might expect, the Cloud version will connect to your cloud storage (Google Drive, Dropbox, Box, etc.) and allows you to work with your cloud storage files as if they were local. Install the Cloud version to get that functionality and then install the other modules to add SMB (Samba) and Bluetooth connectivity. ASTRO File Manager also includes powerful search and filter functions that can help you easily locate your files.