Web services make it easy to synchronize files
It used to be that most consumers had only a single computer to manage.
Today, many people use two or more computers. That change has introduced a big headache: How to keep up-to-date versions of all your key files on all the computers where you work on them.
Some people place files on a portable device, and then manually copy the files to all their computers. Others e-mail selected files to themselves. But these methods are time-consuming and imperfect.