There are some great tools available on the web to help you manage and protect the files on your PC or MAC. I discuss aids to using your PC in greater detail at my Joe Budelis Help page. Here, I'll just mention two of the web sites that I recently started using that provide a great service and it's free for their basic offering.
Do you work on more than one computer? If so, wouldn't it be great if files on the two (or more) computers that you work on were kept synched? Well, files on more than one computer are kept synched by DropBox as long as each of the computers is connected to the Internet.
Have you ever lost files cause of a failed hard drive, viruses, trojans, or some other reason? If so, you know that it's important to back up your files. You can set IDrive to back up files on a scheduled basis.
In both cases, you receive a certain amount of space free. The free space can be increased by referring others to these services. In fact, by using the links in the two preceding paragraphs, you will increase the size of my free space.