Windows 8.1 comes with an integrated feature that’s disabled by default but which I highly recommend because it provides an automatic cloud backup for all your documents.
Launch the Settings Charm (Windows Key + i), click Change PC settings in the bottom of the slide out pane and then choose Skydrive from the left pane.
In the File Storage section, flip the switch for Save documents to SkyDrive by default to the ON position. Now, when you save files on your local computer they’ll automatically save to Skydrive too. If you don’t have a network connection, Windows stores the save locally and uploads it to the cloud once network connectivity resumes.
You can also view all the files on SkyDrive by clicking the link under the ON switch.