Sorry, these are the four files I downloaded from getsol.us this morning as regular HTTP downloads. I only remembered the unconfirmed part of the file extensions:
I haven't tried burning any of them to a USB drive yet ... thought I'd ask about them first. With very few active seeders, my torrent downloads are going very slowly. I don't know whether those will result .ISO files or the above "unconfirmed" ones.
EDIT: It's possible this was caused by a bug in Chrome, which I used for these downloads because my customary browser, Vivaldi, seems to be a lot slower downloading large files. Other than that, I don't normally use Chrome for anything.
I'm testing that theory now, downloading them again using Firefox on a different computer. More Solus users are apparently awake by now, because the downloads are very slow. I'll let you know what I find out when one of them is finished.