Media files not showing in new multi sites

Ive been working on my website for a few years so it has all my pages, images, settings just right. I now wanted to duplicate that site in multisite. So I installed the new blog plugin, set my main site as the blog template and then added a new site. Everything copied except the media files, they show as broken links in the media folder. Ive seen it said not to use your main site as the blog theme buts its all I have, I could never set up a new site and redo all this work on it.. What can I do to get media to copy ?