Windows Phone 8 Basics - Backup and storage - To sync documents from SkyDrive to your phone

On your phone, sign in with a Microsoft account.
In the App list, tap Office Office icon.
You'll see that your SkyDrive has been added to Places. Flick to Recent to see documents on SkyDrive that you've recently opened from somewhere else. Other documents you've recently opened on your phone will appear there too.

To open a document, do either of the following:
Flick to Places, tap SkyDrive, tap a folder, and then tap a document or notebook to open it.
Flick to Recent, and then tap a document.
If you don't see the file you're looking for on SkyDrive, you can do any of the following in the Office Hub to search for it:
To search for a document, flick to Places or Recent, tap SearchSearch icon, and then start typing the file name. Tap the one you're interested in to open and edit it.
To search for a particular note, flick to Places, tap SkyDrive, and then tap a notebook to open it in Microsoft OneNote Mobile. In OneNote, tap SearchSearch icon, and then type a notebook name, section name, page title, or a word or two that might appear in a note. Tap Enter Enter icon, and then tap a notebook, section, or page to open it.