Online Back up

One of my friend's computer was broke. For some reasons, its just quit on her and never came back on. I thought it was a virus because it just shows blue color on the screen and she says before it quit she found many strange thing like pop-ups. Luckily, my friend is smart enough to use online backup service. In times like this she want to securely store and prevent the loss of her files. A job well done for her though