Solve : Backing up without changing/writing over what's already been b

1.	Solve : Backing up without changing/writing over what's already been backed up??
Answer» Hi everyone. I'm new here. I have what is maybe a unique question and I really hope you folks can help me. A few years ago, I put everything I wanted backed up into my My Documents folder and decided that would be the only folder in which I'd ever store anything I wanted backed up. I backed up TEN years worth of everything (documents, images, videos, and my music library) to my EXTERNAL drive. It TOOK a very long time and as a result, I haven't sat down to back anything up since. Here's my question: Is there a way for me to back up only the files/folders that have been added/updated without touching the stuff that's already on the external drive? Is there a command line I can use or SOMETHING? (Also... the last time I backed up, all my files were saved as "Read Only." I don't know why it would do that or if it's normal but if there's a way to stop that from happening, I'd love to know it.) Thanks everyone!Double post - please CONTINUE here..

Solve : Backing up without changing/writing over what's already been backed up??