Hey guys. I'm new to the forum and macs in general - first post! But I had a quick question. I just got a standard MBP 13'' with Snow Leopard a month or two ago. I'm trying to copy some movies and music to an external hard drive just to back it up in a different place. I'm trying to just drag the files from my hard drive under my username under places to an external hard drive folder. It won't let me drag ANYTHING into it - movies, music, documents, nothing! I was wondering if there was something I had to configure with my external hard drive to get it to let me add files, or if it was something with the configuration of the actual macbook? Thanks a lot for the help 
