If you want a mirror it would be nice just to ask the owner for a DVD set of
the data which takes little time and doesn't hog bandwidth from others who
just want a few files.
I ran a private FTP during the later 90's when cable 1st came around in my
area. I never cared if people connected and downloaded what was on the site
as long as they didn't use software that logged in multiple times to suck
down all the bandwidth from the other users, and didn't hammer the site
every second to get on when the slots were full. Everybody is different and
you need to respect their rules.