You are downloading the Files XAP file v2014.523.1121.3909 for Windows Phone. Files is a free Productivity App: Files is a free app for managing files on your Windows Phone. By using this app you can: • Access files stored on your phone and SD. You can now download the offline XAP package file to install & try it.
Download Locations for Files 2014.523.1121.3909 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Files XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.