SkyDrive from Microsoft is the place to store your files so you can access them from virtually any device.  Windows Phone has built-in access to SkyDrive right from the Office and Pictures hubs. It can also automatically upload pictures you take to SkyDrive for easy access.

Now the SkyDrive app for Windows Phone also lets you manage and share files – all in one place.
You can:
• Browse your entire SkyDrive including files shared with you
• View recently used documents
• Upload your pictures
• Share a link to any file using email
• Create folders. Delete files or folders

Windows Phone link 

iPhone link