I'm not 100% following, but if this is content that's gone from being publicly viewable, uploading it to archive.org seems appropriate (but don't take my word for it). Though if you do upload, it sounds like just the "part files" or just the "full files" would be enough. You could then also seed the torrent there.
The imgur links you might try uploading to ArchiveTeam's imgur-grab project. Looking at the tracker, the archival seems currently half dead, but I'm sure they'll get around to saving what's left. (Unless it's dead because imgur made it nigh impossible, which I can definitely imagine)
I will upload them to archive.org later on. Also regarding the imgur images sorry for the misunderstanding, they are still available but the disqus downloader I built didn't download them because I didn't know about their existence and didn't account for them I will fix it later.
Edit: I checked the uploading troubleshooting page and I think I might not need a torrent since they have a max size limit of around 500GB