You no longer have to go searching app-by-app to find a buried file on your Windows Phone. Right on schedule, Microsoft has released its Files app; if youre running Windows Phone 8.1, you can now dig through folders to open and manipulate documents stored anywhere on your device. The interface wont compare to what you get on your PC, but it should be useful for offloading photos to an SD card or deleteing videos that are chewing up space.