Make sure all your locally stored documents (those are documents on in the "Documents" folder, on the "Desktop", your "C:" drive, or "On my Mac") are backed up.  The easiest way to do so is to upload them to your Google Drive or MS OneDrive.  You can access drive at https://drive.google.com or by clicking it in the "Google Waffle".  You can access OneDrive by logging in at https://office.com