Educate me :)

I'm very interested in FTP type access to my files, yet I keep VERY few files on my actual computer. at this time I'm considering a NAS box, and the reason FTP is interesting, is for me to be able to access my files REMOTELY through the NAS box. Is this possible? I thought the program was downloaded on a home computer, or am I wrong and the SMARTFTP is on the computer that access the files on my NAS box?

Help me understand please. Thank you.

The latter is true. SmartFTP is the client which is needed to access file which are hostet on an FTP server.