1. File Expert with Clouds
File Expert - the most friendly file manager for your Android devices! Fully-featured as File Expert, it allows you to manage your mobile phones, tablets, personal computers and cloud storage servers easily. https://youtu.be/F-fuTy4j2ZU Check it out2. File Explorer
FX File Explorer 5 features a Material Design UI and new ways to transfer your files between devices and computers. FX is a file explorer built to make working with files and media on your phone or tablet as easy as it is on your computer Check it out3. File Commander
File Commander is a complete file manager that allows you to handle any file on your Android device via a clean and intuitive interface. You can also separately handle libraries of pictures, music, videos, documents, as well as rename, delete, move, zip and send with just a few taps. https://youtu.be/bzyAasC7XaU Check it out4. File Manager HD
File Manager HD can Cut, copy, paste, delete, compress, decompress, search and more. Switch between local and cloud files - supports Dropbox, Box, Google Drive, SkyDrive and more. Use your PC to wirelessly edit your mobile files using FTP. https://youtu.be/AfFlGeS3rqM Check it out5. ASTRO File Manager
ASTRO File Manager finds and manages all of your files, no matter where they are located. Explore your Android device, SD card and cloud storage for that photo or song. With ASTRO's CLOUD HOPPING (TM), you can move files between cloud storage with a single click. Check it outAlso see - How to Remove Virus from Your Android Device
According to me the best from lot is File Manager HD as it has many features that are advanced in nature and you could extract the full potential of your device with it. Do leave a comment below and tell us which one do you prefer?