Windows Phone 8.1 the latest and most awaited update from Microsoft, brings a bunch of new features to windows phone.
We have a developer preview installed in our phones [How to get Windows 8.1 before its official launch], So some changes will be made in the final stable version of update regarding bug fixes and small improvements.
Here we focus on the new features of WP8.1 :-

1. Action center :-

Action Center is a notification hub
Yes you've heard right , File Manager is coming to Windows Phone and steady steady Microsoft is building its blocks.
In Official Windows Phone UserVoice portal a user suggested  to add file manager to windows phone , eventually it got high votes after which Microsoft heard UserVoice replying the offcial release date of the file manager called "Files".

It will release in next month i.e. June of 2014.

According to screenshots it is clear that it will allow to view files, marking of files, creating new folders and may be more features.
The Windows Phone team marking the thread as complete.
Via- WP-UserVoice