Many say windows phone does not have a file explorer but in WP8.1, Microsoft made it opened somewhat more and that has allowed myriad developers an opportunity to make a file explorer for windows phone and the one we recommend getting is the Aerize Explorer.
This application lets you explorer files and folders on the device as well as on micro SD card. Like a regular windows file explorer, you can search for video files, pictures files and music files.
* Move files and folders between your device and media card
* Share files with NFC, Bluetooth, Email, and much more
* Cut, Copy, Paste, Delete and Rename files or folders
* View file and folder properties
The application is free to download and can recognize all common file types.