Hi Susan, the Amazon site has a better description than Samsung's site does (rather scary).
You may want to shoot Jim Roseberry a PM to see what options are available. No PCMCIA slots, but I have heard of folks removing the DVD drive to add a second hard drive. I have never torn a laptop apart, so not sure if this is even an option (or if you would even want it).
A USB interface that fits the bill for you may be the most painless option.