There are several reasons to save your photos and video online. One reason could be you’re running out of storage on your device. Another reason is having a backup in case your phone breaks. Whatever the reason may be, Windows Phone 8.1 can automatically save the photos and videos you take to OneDrive. Setting it up is fast and easy.
More details: http://www.windowscentral.com/how-to-auto-upload-photos-videos-onedrive