Hey guys, im trying to download and old soon to be defunct forum before it
falls off the internet and I was wondering if it is possible to download the
main site first and then after that is completed download the externally
hosted content.

The forum is the only thing going down, so is it possible to download
forum.com (just an example name) before downloading say the images hosted in
imgur and photo bucket?
I don't know how long the website has left so I would like to spend all of my
power downloading the site (as it is rather large with over 4 million
messages) instead of a mix of the site and external content.